Merge pull request #7498 from open-webui/dependabot/pip/backend/dev/sentence-transformers-3.3.1

chore(deps): bump sentence-transformers from 3.2.0 to 3.3.1 in /backend

backend/requirements.txt

@@ -48,7 +48,7 @@ pymilvus==2.4.9
 qdrant-client~=1.12.0
 opensearch-py==2.7.1
 
-sentence-transformers==3.2.0
+sentence-transformers==3.3.1
 colbert-ai==0.2.21
 einops==0.8.0