chore(deps): update python docker tag to v3.10.20 (#724)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

renovate.Dockerfile

@@ -14,7 +14,7 @@ ENV PYTHON_VERSION=3.9.25
 
 # EOL 2026-10
 # renovate: datasource=docker depName=python versioning=docker
-ENV PYTHON_VERSION=3.10.19
+ENV PYTHON_VERSION=3.10.20
 
 # EOL 2027-10
 # renovate: datasource=docker depName=python versioning=docker