⬆️ Bump github-markdown-css from 5.7.0 to 5.8.0

Bumps [github-markdown-css](https://github.com/sindresorhus/github-markdown-css) from 5.7.0 to 5.8.0.
- [Release notes](https://github.com/sindresorhus/github-markdown-css/releases)
- [Commits](sindresorhus/github-markdown-css@v5.7.0...v5.8.0)

---
updated-dependencies:
- dependency-name: github-markdown-css
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -19,7 +19,7 @@
     "@fontsource/carter-one": "^5.1.0",
     "@fontsource/ibm-plex-sans-jp": "^5.1.0",
     "astro": "^4.16.10",
-    "github-markdown-css": "^5.7.0",
+    "github-markdown-css": "^5.8.0",
     "rehype-accessible-emojis": "^0.3.2",
     "remark-toc": "^9.0.0",
     "tailwindcss": "^3.4.14",