Merge pull request #2072 from CentreForDigitalHumanities/dependabot/pip/backend/urllib3-2.7.0

Bump urllib3 from 2.6.3 to 2.7.0 in /backend

Author: lukavdplas

backend/requirements.txt

@@ -252,7 +252,7 @@ tzdata==2025.2
     # via
     #   kombu
     #   pandas
-urllib3==2.6.3
+urllib3==2.7.0
     # via
     #   django-revproxy
     #   elastic-transport