chore: bump squidfunk/mkdocs-material in /docs (#1984)

Bumps squidfunk/mkdocs-material from `0bfdba4` to `bb7b015`.

---
updated-dependencies:
- dependency-name: squidfunk/mkdocs-material
  dependency-version: bb7b015690d9fb5ef0dbc98ca3520f153aa43129fb96aec5ca54c9154dc3b729
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/Dockerfile

@@ -1,4 +1,4 @@
-FROM squidfunk/mkdocs-material@sha256:0bfdba448e93984191246f7a28abeacc79f789e7e9cf0c639a48fe4365e880a7
+FROM squidfunk/mkdocs-material@sha256:bb7b015690d9fb5ef0dbc98ca3520f153aa43129fb96aec5ca54c9154dc3b729
 
 COPY requirements.txt /tmp/
 RUN pip install --require-hashes -r /tmp/requirements.txt