Fix: Add permissions to workflow for LFS warning action

.github/workflows/deploy-to-hf.yml

@@ -12,6 +12,9 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
     environment:
       name: production
       url: https://huggingface.co/spaces/pkgprateek/ai-rag-document