Merge pull request #4367 from open-webui/dependabot/pip/backend/dev/python-pptx-1.0.0

chore(deps): bump python-pptx from 0.6.23 to 1.0.0 in /backend

backend/requirements.txt

@@ -43,7 +43,7 @@ chromadb==0.5.4
 sentence-transformers==3.0.1
 pypdf==4.3.1
 docx2txt==0.8
-python-pptx==0.6.23
+python-pptx==1.0.0
 unstructured==0.15.0
 Markdown==3.6
 pypandoc==1.13