Merge pull request #4037 from open-webui/dependabot/pip/backend/dev/langfuse-2.39.2

chore(deps): bump langfuse from 2.38.0 to 2.39.2 in /backend

backend/requirements.txt

@@ -65,7 +65,7 @@ PyJWT[crypto]==2.8.0
 authlib==1.3.1
 
 black==24.4.2
-langfuse==2.38.0
+langfuse==2.39.2
 youtube-transcript-api==0.6.2
 pytube==15.0.0