chore(deps): update weblate/base docker tag to v2026.20.0 (#4529)

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

Author: renovate[bot]

Dockerfile

@@ -51,7 +51,7 @@ RUN find /app/src -name '*.patch' -print0 | sort -z | \
   xargs -n1 -0 -r patch -p1 -d "/app/venv/lib/python${PYVERSION}/site-packages/" -i
 
 
-FROM weblate/base:2026.19.0@sha256:51ca457c469cb4d6c6661a376090ac229be746c62dc146ce56aea6038e79a4c1 AS final
+FROM weblate/base:2026.20.0@sha256:72dd3867fdd0b0e66679468a2ea72db75a3cf621286261c50a143fcc342a1c0e AS final
 
 # renovate: datasource=pypi depName=Weblate versioning=pep440
 ENV WEBLATE_VERSION=5.17.1