Merge pull request #4538 from open-webui/dependabot/pip/backend/dev/chromadb-0.5.5

chore(deps): bump chromadb from 0.5.4 to 0.5.5 in /backend

backend/requirements.txt

@@ -39,7 +39,7 @@ langchain-community==0.2.10
 langchain-chroma==0.1.2
 
 fake-useragent==1.5.1
-chromadb==0.5.4
+chromadb==0.5.5
 sentence-transformers==3.0.1
 pypdf==4.3.1
 docx2txt==0.8