Bump html-validate from 8.27.0 to 9.0.0 · Agda-zh/PLFA-zh@ba41a79

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Test with HTML-validate: _site/Confluence/index.html#L244

Prefer to use the native <ul> element

Test with HTML-validate: _site/Confluence/index.html#L244

Prefer to use the native <li> element

Test with HTML-validate: _site/Confluence/index.html#L244

Prefer to use the native <li> element

Test with HTML-validate: _site/Confluence/index.html#L244

Prefer to use the native <li> element

Test with HTML-validate: _site/Confluence/index.html#L244

Prefer to use the native <li> element

Test with HTML-validate: _site/Contributing/index.html#L43

Prefer to use the native <ul> element

Test with HTML-validate: _site/Contributing/index.html#L43

Prefer to use the native <li> element

Test with HTML-validate: _site/Denotational/index.html#L514

Prefer to use the native <ul> element

Test with HTML-validate: _site/Denotational/index.html#L514

Prefer to use the native <li> element

Test with HTML-validate: _site/Denotational/index.html#L514

Prefer to use the native <li> element

Build: tools/Buildfile/Book.hs#L77

In the use of ‘tail’

Build: tools/Buildfile/Script.hs#L30

In the use of ‘routeUrl’ (imported from Shoggoth.Routing):

Build: tools/Buildfile/Script.hs#L31

In the use of ‘routeUrl’ (imported from Shoggoth.Routing):

Build: tools/Buildfile/Stylesheet.hs#L32

In the use of ‘routeUrl’ (imported from Shoggoth.Routing):

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