Miscellaneous editorial updates (#6805)

### What problem does this PR solve?



### Type of change

- [x] Documentation Update

web/src/locales/en.ts

@@ -370,7 +370,7 @@ This auto-tagging feature enhances retrieval by adding another layer of domain-s
       addTag: 'Add tag',
       useGraphRag: 'Extract knowledge graph',
       useGraphRagTip:
-        'Construct a knowledge graph over extracted file chunks to enhance multi-hop question answering.',
+        'Construct a knowledge graph over file chunks of the current knowledge base to enhance multi-hop question-answering involving nested logic. See https://ragflow.io/docs/dev/construct_knowledge_graph for details.',
       graphRagMethod: 'Method',
       graphRagMethodTip: `Light: (Default) Use prompts provided by github.com/HKUDS/LightRAG to extract entities and relationships. This option consumes fewer tokens, less memory, and fewer computational resources.</br>
         General: Use prompts provided by github.com/microsoft/graphrag to extract entities and relationships`,
@@ -594,7 +594,7 @@ This auto-tagging feature enhances retrieval by adding another layer of domain-s
       baseUrlTip:
         'If your API key is from OpenAI, just ignore it. Any other intermediate providers will give this base url with the API key.',
       modify: 'Modify',
-      systemModelSettings: 'System Model Settings',
+      systemModelSettings: 'Set default models',
       chatModel: 'Chat model',
       chatModelTip:
         'The default chat model for each newly created knowledge base.',