chore(docs): bump mkdocs-material

Bumps the python-deps group in /.github/workflows/mkdocs with 1 update: [mkdocs-material](https://github.com/squidfunk/mkdocs-material).


Updates `mkdocs-material` from 9.6.17 to 9.6.18
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.6.17...9.6.18)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-version: 9.6.18
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: python-deps
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/mkdocs/requirements.in

@@ -1 +1 @@
-mkdocs-material==9.6.17
+mkdocs-material==9.6.18

.github/workflows/mkdocs/requirements.txt

@@ -225,9 +225,9 @@ mkdocs-get-deps==0.2.0 \
     --hash=sha256:162b3d129c7fad9b19abfdcb9c1458a651628e4b1dea628ac68790fb3061c60c \
     --hash=sha256:2bf11d0b133e77a0dd036abeeb06dec8775e46efa526dc70667d8863eefc6134
     # via mkdocs
-mkdocs-material==9.6.17 \
-    --hash=sha256:221dd8b37a63f52e580bcab4a7e0290e4a6f59bd66190be9c3d40767e05f9417 \
-    --hash=sha256:48ae7aec72a3f9f501a70be3fbd329c96ff5f5a385b67a1563e5ed5ce064affe
+mkdocs-material==9.6.18 \
+    --hash=sha256:a2eb253bcc8b66f8c6eaf8379c10ed6e9644090c2e2e9d0971c7722dc7211c05 \
+    --hash=sha256:dbc1e146a0ecce951a4d84f97b816a54936cdc9e1edd1667fc6868878ac06701
     # via -r requirements.in
 mkdocs-material-extensions==1.3.1 \
     --hash=sha256:10c9511cea88f568257f960358a467d12b970e1f7b2c0e5fb2bb48cab1928443 \