⚠️ SECURITY-#90: Bump mkdocs-material to 9.7.7

[FernandoCelmer]

Description

Bumps mkdocs-material 9.7.6 → 9.7.7 in poetry.lock (docs group only), closing Dependabot alert #13 — GHSA-xvg9-69gf-fjrf / CVE-2026-73295, DOM XSS in search suggestions via query parameter. typing-extensions 4.15.0 → 4.16.0 came along as a transitive update.

Affects the published docs site only; no library code changed. mkdocs build passes.

Issue: 📌 ISSUE — Closes #90

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation updated (documentation was updated and published)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules