Bump redcarpet from 3.5.1 to 3.6.0 in /docs/_spec (#21231)

Bumps [redcarpet](https://github.com/vmg/redcarpet) from 3.5.1 to 3.6.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/vmg/redcarpet/releases">redcarpet's
releases</a>.</em></p>
<blockquote>
<h2>Redcarpet v3.6.0</h2>
<p>This release is not particularly heavy but brings a few improvements
and fixes.</p>
<h2>Improvements</h2>
<ul>
<li>Avoid warnings running on Ruby 3.2+ (See <a
href="https://redirect.github.com/vmg/redcarpet/issues/721">#721</a>).</li>
<li>Consider <code>&lt;center&gt;</code> as a block-level element (See
<a
href="https://redirect.github.com/vmg/redcarpet/issues/702">#702</a>).</li>
<li>Properly provide a third argument to the <code>table_cell</code>
callback indicating whether the current cell is part of the header or
not.
The previous implementation with two parameters is still supported (See
<a href="https://redirect.github.com/vmg/redcarpet/issues/604">#604</a>
and <a
href="https://redirect.github.com/vmg/redcarpet/issues/605">#605</a>).</li>
</ul>
<h2>Fixes</h2>
<ul>
<li>Match fence char and length when matching closing fence in fenced
code blocks (Fixes <a
href="https://redirect.github.com/vmg/redcarpet/issues/208">#208</a>).</li>
<li>Fix anchor generation on titles with ampersands (Fixes <a
href="https://redirect.github.com/vmg/redcarpet/issues/696">#696</a>).</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/vmg/redcarpet/blob/master/CHANGELOG.md">redcarpet's
changelog</a>.</em></p>
<blockquote>
<h2>Version 3.6.0</h2>
<ul>
<li>
<p>Avoid warnings running on Ruby 3.2+.</p>
<p>Refs <a
href="https://redirect.github.com/vmg/redcarpet/issues/721">#721</a>.</p>
<p><em>Jean Boussier</em></p>
</li>
<li>
<p>Match fence char and length when matching closing fence in fenced
code blocks.</p>
<p>Fixes <a
href="https://redirect.github.com/vmg/redcarpet/issues/208">#208</a>.</p>
<p><em>Martin Cizek, Orchitech</em></p>
</li>
<li>
<p>Consider <code>&lt;center&gt;</code> as a block-level element.</p>
<p>Refs <a
href="https://redirect.github.com/vmg/redcarpet/issues/702">#702</a>.</p>
<p><em>momijizukamori</em></p>
</li>
<li>
<p>Properly provide a third argument to the <code>table_cell</code>
callback indicating
whether the current cell is part of the header or not.</p>
<p>The previous implementation with two parameters is still
supported.</p>
<p>Fixes <a
href="https://redirect.github.com/vmg/redcarpet/issues/604">#604</a>,
Refs <a
href="https://redirect.github.com/vmg/redcarpet/issues/605">#605</a>.</p>
<p><em>Mark Lambley</em></p>
</li>
<li>
<p>Fix anchor generation on titles with ampersands.</p>
<p>Fixes <a
href="https://redirect.github.com/vmg/redcarpet/issues/696">#696</a>.</p>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/vmg/redcarpet/commit/3e3f0b522fbe9283ba450334b5cec7a439dc0955"><code>3e3f0b5</code></a>
Redcarpet v3.6.0</li>
<li><a
href="https://github.com/vmg/redcarpet/commit/6bfff6e8e4e079e96674236a9f072a41165557a0"><code>6bfff6e</code></a>
Add a changelog entry for <a
href="https://redirect.github.com/vmg/redcarpet/issues/721">#721</a></li>
<li><a
href="https://github.com/vmg/redcarpet/commit/50961ad789c97e5b5606116755df15a6b0498f79"><code>50961ad</code></a>
Merge pull request <a
href="https://redirect.github.com/vmg/redcarpet/issues/721">#721</a>
from casperisfine/ruby-3.2</li>
<li><a
href="https://github.com/vmg/redcarpet/commit/24886993da577bea955747ce74f5f98600ffa7d6"><code>2488699</code></a>
Merge pull request <a
href="https://redirect.github.com/vmg/redcarpet/issues/724">#724</a>
from amatsuda/test_files</li>
<li><a
href="https://github.com/vmg/redcarpet/commit/021538f5b4765b04ecd1ea612fd653ff2de04100"><code>021538f</code></a>
Missing files in the gem package</li>
<li><a
href="https://github.com/vmg/redcarpet/commit/cec4965821b12a2fdfbd9ccf05c05496925bdef7"><code>cec4965</code></a>
Don't include test files in the gem package</li>
<li><a
href="https://github.com/vmg/redcarpet/commit/4028670a0e99b40af9b20f20e36b2a611797cf2f"><code>4028670</code></a>
Merge pull request <a
href="https://redirect.github.com/vmg/redcarpet/issues/723">#723</a>
from amatsuda/https</li>
<li><a
href="https://github.com/vmg/redcarpet/commit/28e0a00535a3c4a4b47c11b887b329e69446492f"><code>28e0a00</code></a>
GitHub is HTTPS by default</li>
<li><a
href="https://github.com/vmg/redcarpet/commit/8bc69225526055727a41b786f5eaa7c68fbb8d0b"><code>8bc6922</code></a>
Undefine uneeded T_DATA allocators</li>
<li><a
href="https://github.com/vmg/redcarpet/commit/03b664dad162eb09b81769c9bb881fd66a8ea960"><code>03b664d</code></a>
Merge pull request <a
href="https://redirect.github.com/vmg/redcarpet/issues/681">#681</a>
from orchitech/match-closing-fence-type-and-length</li>
<li>Additional commits viewable in <a
href="https://github.com/vmg/redcarpet/compare/v3.5.1...v3.6.0">compare
view</a></li>
</ul>
</details>
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</details>

docs/_spec/Gemfile

@@ -6,4 +6,4 @@ gem "jekyll", "3.6.3"
 gem "webrick"
 gem "rouge"
 # gem 's3_website'
-gem "redcarpet", "3.5.1"
+gem "redcarpet", "3.6.0"

docs/_spec/Gemfile.lock

@@ -33,7 +33,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    redcarpet (3.5.1)
+    redcarpet (3.6.0)
     rouge (2.2.1)
     safe_yaml (1.0.5)
     sass (3.7.4)
@@ -49,7 +49,7 @@ PLATFORMS
 
 DEPENDENCIES
   jekyll (= 3.6.3)
-  redcarpet (= 3.5.1)
+  redcarpet (= 3.6.0)
   rouge
   webrick