chore(deps): update python docker tag to v3.13 - autoclosed

This MR contains the following updates:

Package	Type	Update	Change
python	image	minor	3.12-alpine -> 3.13-alpine

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.gitlab-ci.yml

@@ -27,7 +27,7 @@ lint-jinja:
     - poetry run djlint theme/funkwhale/templates --check --lint --profile=jinja
 
 build:
-  image: python:3.12-alpine
+  image: python:3.13-alpine
   stage: build
   variables:
     SITEURL: "http://$CI_PROJECT_NAMESPACE.pages.funkwhale.audio/-/$CI_PROJECT_NAME/-/jobs/$CI_JOB_ID/artifacts/public"
@@ -48,7 +48,7 @@ build:
     - echo "a11y_urls=$CI_ENVIRONMENT_URL" >> job.env
 
 deploy:
-  image: python:3.12-alpine
+  image: python:3.13-alpine
   stage: deploy
   only:
     - main@funkwhale/blog.funkwhale.audio