Update dependency ex_doc to v0.38.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ex_doc (source)	dev	patch	0.38.3 -> 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

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Configuration

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[coveralls]

Pull Request Test Coverage Report for Build 0197e1a5cbb20cbc28b02eb70b4f08cd45210753-PR-252

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 9e8428e4e4888cd0eea98655bfd8088a719621b1:	0.0%
Covered Lines:	120
Relevant Lines:	120

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💛 - Coveralls