Update requirements for docs

[cigamit]

Bulk update of requirements to resolve ~20 CVEs

[ciq-it-service-account]

⛔ Snyk checks have failed. 1 issues have been found so far.

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⛔	Licenses	0	1	0	0	1 issues
✅	Code Security	0	0	0	0	0 issues

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[Copilot]

Pull request overview

Updates the documentation build dependency lockfile (docs/requirements.txt) to newer pinned versions, aligning with the stated goal of addressing multiple dependency CVEs in the docs toolchain (MkDocs + plugins).

Changes:

• Refreshed the pip-compiled dependency set for docs (notably mkdocs-ansible, mkdocs-material, and related plugins).
• Added/removed transitive packages as dependency graphs changed (e.g., new entries like properdocs, mkdocs-get-deps, backrefs).
• Updated # via annotations and the -r docs/requirements.in reference to reflect the current input file path.

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