Bump ex_doc from 0.30.4 to 0.30.6

[dependabot[bot]]

Bumps ex_doc from 0.30.4 to 0.30.6.

Changelog

Sourced from ex_doc's changelog.

v0.30.6 (2023-08-25)

• Enhancements
  • Extract title from Markdown file when preceeded with comments
  • Improve focus navigation in notebooks

v0.30.5 (2023-08-12)

• Bug fixes
  • Fix style for code in headers
  • Fix search data generation for Erlang/OTP

Commits

• 48949c5 Release v0.30.6
• c47807c Extract title even with comments
• 4628900 Update assets
• 67af3be Make checked switch button focus state visible
• 32bb4ff Show function header link when focused
• f63316e Update assets
• 1c85e72 Remove unecessary css
• 4928aa8 Fix view links on cheatsheets
• c4aaf36 Update assets
• f165492 Add text decoration to admonition
• Additional commits viewable in compare view

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