Update mkdocs-material[imaging] requirement from ~=9.5.3 to ~=9.5.4 (#51)

Updates the requirements on [mkdocs-material[imaging]](https://github.com/squidfunk/mkdocs-material) to permit the latest version.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.5.3...9.5.4)

---
updated-dependencies:
- dependency-name: mkdocs-material[imaging]
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

doc_requirements.txt

@@ -1,4 +1,4 @@
-mkdocs-material[imaging]~=9.5.3
+mkdocs-material[imaging]~=9.5.4
 mkdocs~=1.5.3
 mkdocstrings-python~=1.8.0
 black~=23.12.1