chore(deps): update dependency ex_doc to v0.38.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	OpenSSF
ex_doc (source)	dev	minor	0.37.3 -> 0.38.4

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Release Notes

elixir-lang/ex_doc (ex_doc)

v0.38.4

Compare Source

• Bug fixes
  • Fix escaping of links when they have ampersand in them
  • Increase spacing of footers in pages
  • Align stale icon positioning

v0.38.3

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• Enhancements
  • Allow configuring autocomplete limit, and default it to 10 instead of 8
  • Display description text in docs groups
  • Load discovered makeup apps for CLI

v0.38.2

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• Bug fixes
  • Render documents with hardcoded <h2>/<h3> entries correctly
  • Fix padding on external links

v0.38.1

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• Bug fixes
  • Ensure stripping apps for Erlang sources emit valid AST

v0.38.0

Compare Source

• Enhancements

  • Allow listing outside URLs in extras

  • Bug fixes

    • Ensure some cases where <, >, & and in headers would appear as entities in the sidebar
    • Fix outline caused by swup.js on Webkit based browsers
    • Fix bugs when computing synopsis
    • Automatically close the sidebar when navigating sections on mobile

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