Bump syntax_tree from 5.3.0 to 6.1.1

Bumps [syntax_tree](https://github.com/kddnewton/syntax_tree) from 5.3.0 to 6.1.1.
- [Release notes](https://github.com/kddnewton/syntax_tree/releases)
- [Changelog](https://github.com/ruby-syntax-tree/syntax_tree/blob/main/CHANGELOG.md)
- [Commits](ruby-syntax-tree/syntax_tree@v5.3.0...v6.1.1)

---
updated-dependencies:
- dependency-name: syntax_tree
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -104,7 +104,7 @@ GEM
     sprockets (4.2.0)
       concurrent-ruby (~> 1.0)
       rack (>= 2.2.4, < 4)
-    syntax_tree (5.3.0)
+    syntax_tree (6.1.1)
       prettier_print (>= 1.2.0)
     syntax_tree-haml (3.0.0)
       haml (>= 5.2, != 6.0.0)