[renovate] Update python Docker tag to v3.11.4

This MR contains the following updates:

Package	Type	Update	Change
python	image	patch	3.11.3-slim-bullseye -> 3.11.4-slim-bullseye

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.gitlab/ci/.mk-docs-deploy.yml

 build-mkdocs:
-    image: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/python:3.11.3-slim-bullseye
+    image: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/python:3.11.4-slim-bullseye
     stage: build
     before_script:
         - pip install mkdocs-material
@@ -13,7 +13,7 @@ build-mkdocs:
         - if: $CI_COMMIT_REF_PROTECTED == "true"
 
 .pages-options: &pages-options
-    image: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/python:3.11.3-slim-bullseye
+    image: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/python:3.11.4-slim-bullseye
     stage: deploy
     script:
         - mv mkdocs-built public