Merge branch 'renovate/sphinxcontrib-django-2.x' into 'main'

Update dependency sphinxcontrib-django to v2.5

See merge request kif/akplanning!197

requirements.txt

@@ -18,7 +18,7 @@ mysqlclient==2.2.0  # for production deployment
 tzdata==2023.3
 
 # Documentation
-sphinxcontrib-django==2.3
+sphinxcontrib-django==2.5
 sphinxcontrib-apidoc==0.3.0
 recommonmark==0.7.1
 django-docs==0.3.3