chore(deps): bump squidfunk/mkdocs-material in /docs

Bumps squidfunk/mkdocs-material from `479a06a` to `f226a2d`.

---
updated-dependencies:
- dependency-name: squidfunk/mkdocs-material
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/Dockerfile

@@ -1,5 +1,5 @@
 # v9.1.18
-FROM squidfunk/mkdocs-material@sha256:479a06a8f5a320a9b2b17e72cb7012388d66ea71a8568235cfa072eb152bc30c
+FROM squidfunk/mkdocs-material@sha256:f226a2d2d5983643cab401491fc40e8a5711a50e90c21433f80e91c014cff1f5
 # pip-compile --generate-hashes --output-file=requirements.txt requirements.in
 COPY requirements.txt /tmp/
 RUN pip install --require-hashes -r /tmp/requirements.txt