chore(deps): bump squidfunk/mkdocs-material from 257eca8 to 9919d6e in /docs (aws-powertools#4878)

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

Bumps squidfunk/mkdocs-material from `257eca8` to `9919d6e`.

---
updated-dependencies:
- dependency-name: squidfunk/mkdocs-material
  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

@@ -1,5 +1,5 @@
 # v9.1.18
-FROM squidfunk/mkdocs-material@sha256:257eca88da7f42242cd05e8cebf6d10ebd079edc207b089ad3f4f1ad107b0348
+FROM squidfunk/mkdocs-material@sha256:9919d6ee948705ce6cd05e5bc0848af47de4f037afd7c3b91e776e7b119618a4
 # pip-compile --generate-hashes --output-file=requirements.txt requirements.in
 COPY requirements.txt /tmp/
 RUN pip install --require-hashes -r /tmp/requirements.txt