docs: Revert Python to 3.7.9 in docs-builder, downgrade a dependency

.github/workflows/documentation.yaml

@@ -59,7 +59,7 @@ jobs:
       - name: Run pre-requisites for validation
         run: |
           make -C Documentation copy-api # necessary for check-build.sh
-      - uses: docker://cilium/docs-builder:2023-02-24@sha256:2f5689df73c3e6090c5c83bcd546a35c44e40b1d770dae9044c0b4c2966b45fd
+      - uses: docker://cilium/docs-builder:2023-03-01@sha256:36b233afd73482c2bc7ed43f7a1537f09962015c34679b86c4ca1fa618d67b95
         with:
           entrypoint: ./Documentation/check-build.sh
           args: html

Documentation/Dockerfile

@@ -1,4 +1,5 @@
-FROM docker.io/library/python:3.10.4-alpine3.15 AS docs-base
+# Python version should match the one in use in Read The Docs
+FROM docker.io/library/python:3.7.9-alpine3.13 AS docs-base
 
 LABEL maintainer="maintainer@cilium.io"
 
@@ -30,4 +31,4 @@ ENV MAKE_GIT_REPO_SAFE=1
 ## Workaround odd behaviour of sphinx versionwarning extension. It wants to
 ## write runtime data inside a system directory.
 ## We do rely on this extension, so we cannot just drop it.
-RUN install -m 0777 -d /usr/local/lib/python3.10/site-packages/versionwarning/_static/data
+RUN install -m 0777 -d /usr/local/lib/python3.7/site-packages/versionwarning/_static/data

Documentation/requirements-min/requirements.txt

@@ -1,4 +1,4 @@
-Sphinx==5.3.0
+sphinx==5.3.0
 sphinx-autobuild==2021.3.14
 
 # Custom theme, forked from Read the Docs

Documentation/requirements.txt

@@ -1,5 +1,5 @@
 ## Auto-generated from requirements-min/requirements.txt with "make update-requirements"
-Sphinx==5.3.0
+sphinx==5.3.0
 sphinx-autobuild==2021.3.14
 
 # Custom theme, forked from Read the Docs
@@ -20,7 +20,7 @@ yamllint==1.29.0
 ## The following requirements were added by pip freeze:
 alabaster==0.7.13
 attrs==22.2.0
-Babel==2.11.0
+Babel==2.12.1
 certifi==2022.12.7
 charset-normalizer==3.0.1
 click==8.1.3
@@ -30,6 +30,8 @@ deepmerge==1.1.0
 docutils==0.17.1
 idna==3.4
 imagesize==1.4.1
+importlib-metadata==4.13.0
+importlib-resources==5.12.0
 Jinja2==3.0.3
 jsonschema==4.17.3
 livereload==2.6.3
@@ -41,6 +43,7 @@ mistune==2.0.5
 packaging==23.0
 pathspec==0.11.0
 picobox==2.2.0
+pkgutil-resolve-name==1.3.10
 pydantic==1.10.5
 pyenchant==3.2.2
 Pygments==2.14.0
@@ -53,16 +56,17 @@ rstcheck-core==1.0.3
 shellingham==1.5.0.post1
 six==1.16.0
 snowballstemmer==2.2.0
-sphinx_mdinclude==0.5.3
-sphinxcontrib-applehelp==1.0.4
+sphinx-mdinclude==0.5.3
+sphinxcontrib-applehelp==1.0.2
 sphinxcontrib-devhelp==1.0.2
-sphinxcontrib-htmlhelp==2.0.1
+sphinxcontrib-htmlhelp==2.0.0
 sphinxcontrib-httpdomain==1.8.1
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
 tornado==6.2
 typer==0.7.0
 types-docutils==0.19.1.6
-typing_extensions==4.5.0
+typing-extensions==4.5.0
 urllib3==1.26.14
+zipp==3.15.0