chore(deps): bump mkdocs-material from 9.5.5 to 9.5.6 in /docs (#1984)

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 9.5.5 to 9.5.6.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.5.5...9.5.6)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

docs/requirements.in

@@ -1,4 +1,4 @@
 mike==1.1.2
-mkdocs-material==9.5.5
+mkdocs-material==9.5.6
 mkdocs-git-revision-date-plugin==0.3.2
 mkdocs-exclude==1.0.2

docs/requirements.txt

@@ -229,9 +229,9 @@ mkdocs-exclude==1.0.2 \
 mkdocs-git-revision-date-plugin==0.3.2 \
     --hash=sha256:2e67956cb01823dd2418e2833f3623dee8604cdf223bddd005fe36226a56f6ef
     # via -r requirements.in
-mkdocs-material==9.5.5 \
-    --hash=sha256:4480d9580faf42fed0123d0465502bfc1c0c239ecc9c4d66159cf0459ea1b4ae \
-    --hash=sha256:ac50b2431a79a3b160fdefbba37c9132485f1a69166aba115ad49fafdbbbc5df
+mkdocs-material==9.5.6 \
+    --hash=sha256:5b24df36d8ac6cecd611241ce6f6423ccde3e1ad89f8360c3f76d5565fc2d82a \
+    --hash=sha256:e115b90fccf5cd7f5d15b0c2f8e6246b21041628b8f590630e7fca66ed7fcf6c
     # via -r requirements.in
 mkdocs-material-extensions==1.3.1 \
     --hash=sha256:10c9511cea88f568257f960358a467d12b970e1f7b2c0e5fb2bb48cab1928443 \