Update mkdocs-material requirement from <7.3.0,>=7.1.0 to >=7.1.0,<7.4.0 in /requirements

[dependabot[bot]]

Updates the requirements on mkdocs-material to permit the latest version.

Release notes

Sourced from mkdocs-material's releases.

mkdocs-material-7.3.0

• Added support for sticky navigation tabs
• Added support for section index pages
• Added support for removing generator notice

Changelog

Sourced from mkdocs-material's changelog.

7.3.0 _ September 23, 2021

• Added support for sticky navigation tabs
• Added support for section index pages
• Added support for removing generator notice

7.2.8 _ September 20, 2021

• Fixed #3039: Search modal overlays menu on mobile (7.2.7 regression)

7.2.7 _ September 19, 2021

• Updated Serbian and Serbo-Croatian translations
• Improved appearance of outline on details
• Fixed #2934: Scrollbar when header is hidden on some mobile browsers
• Fixed #3032: Anchor in details doesn't open on load (7.0.0 regression)
• Fixed back-to-top button being focusable when invisible
• Fixed broken admonition icons (removed in upstream)

7.2.6 _ September 1, 2021

• Fixed rendering of blockquote elements (7.0.0 regression)
• Fixed #2973: Custom search worker setting ignored

7.2.5 _ August 25, 2021

• Updated Portuguese translations
• Fixed execution of RxJS teardown logic (7.2.3 regression)
• Fixed #2970: Search results show escaped characters (7.2.2 regression)

7.2.4 _ August 11, 2021

• Fixed #2926: Version selector not working (7.2.3 regression)
• Fixed #2929: Missing CSS class for banner (consistency with Insiders)

7.2.3 _ August 9, 2021

• Slight facelift of data tables, now closer to Material Design
• Fixed instant loading not respecting clicks on search results
• Fixed #2881: Invalid anchor offsets when using instant loading

7.2.2 _ July 31, 2021

• Updated Korean translations
• Fixed #2879: Search highlighting does not properly escape HTML

7.2.1 _ July 25, 2021

• Fixed #2862: Back-to-top button overlays active search bar

... (truncated)

Commits

• ba1f021 Prepare 7.3.0 release
• 9d8ebcd Added missing distribution files
• 377b4d6 Merge of Insiders features tied to 'Caribbean Red' funding goal
• 62742b4 Formatting
• 8fa40fa Updated documentation for language overrides
• 174cb04 docs: clarify overriding of translations for non-English language
• 166096d Prepare 7.2.8 release
• 2eabc94 Fixed search modal overlaying menu on mobile (7.2.7 regression)
• ea130d1 Added documentation for third-party Docker image
• 96cc7b6 Updated Insiders changelog
• Additional commits viewable in compare view

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