Don't apply the 'literal' color to entire markdown code blocks (#2579)

### Before

![Screen Shot 2023-06-06 at 2 32 46
PM](https://github.com/zed-industries/zed/assets/326587/036f1da3-19c6-4979-adc6-c3133f8d63dc)

### After

![Screen Shot 2023-06-06 at 2 32 08
PM](https://github.com/zed-industries/zed/assets/326587/6d4729db-b76a-4052-847e-fd9de346f194)

Release Notes:

* Improved the syntax highlighting of fenced code blocks in markdown.
This commit is contained in:
Max Brunsfeld 2023-06-06 14:54:24 -07:00 committed by GitHub
commit a9f865d828
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@ -14,11 +14,11 @@
(list_marker_parenthesis)
] @punctuation.list_marker
[
(indented_code_block)
(fenced_code_block)
(code_span)
] @text.literal
(code_span) @text.literal
(fenced_code_block
(info_string
(language) @text.literal))
(link_destination) @link_uri
(link_text) @link_text