Fix: in case running KG repeatly. (#5538)

### What problem does this PR solve?

#5512

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/db/services/document_service.py

     def update_progress(cls):
         MSG = {
             "raptor": "Start RAPTOR (Recursive Abstractive Processing for Tree-Organized Retrieval).",
-            "graphrag": "Entities extraction progress",
-            "graph_resolution": "Start Graph Resolution",
-            "graph_community": "Start Graph Community Reports Generation"
+            "graphrag": "Entities",
+            "graph_resolution": "Resolution",
+            "graph_community": "Communities"
         }
         docs = cls.get_unfinished_docs()
         for d in docs: