Merge pull request #12529 from open-webui/dependabot/pip/backend/dev/azure-identity-1.21.0

build(deps): bump azure-identity from 1.20.0 to 1.21.0 in /backend

backend/requirements.txt

@@ -113,7 +113,7 @@ pytest-docker~=3.1.1
 googleapis-common-protos==1.63.2
 google-cloud-storage==2.19.0
 
-azure-identity==1.20.0
+azure-identity==1.21.0
 azure-storage-blob==12.24.1