Update dependency ex_doc to v0.40.2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	Pending
ex_doc (source)	dev	patch	0.40.1 → == 0.40.2	0.40.3

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Release Notes

elixir-lang/ex_doc (ex_doc)

v0.40.2

Compare Source

• Bug fixes
  • Add rel="nofollow" to external links in HTML output
  • Use blockquote in llms.txt description
  • Void elements in epub, such wbr, must be terminated by the matching end-tag
  • Fix content container scrolling in older versions of Safari
  • Skip HTML comments when computing synopsis
  • Fix markdown backend code fence language and opaque type display
  • Fix false positive warning when linking to asset files
  • Prevent #search selector from impacting user content
  • Raise on extras that conflict with reserved filenames
  • Fix styling of admonition blocks

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