feat: Added explanation on the parsing method of knowledge graph #1594 (#1916)

### What problem does this PR solve?

feat: Added explanation on the parsing method of knowledge graph #1594

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/components/chunk-method-modal/hooks.ts

@@ -27,7 +27,7 @@ const ParserListMap = new Map([
       'one',
       'qa',
       'manual',
-      'knowledge_graph'
+      'knowledge_graph',
     ],
   ],
   [
@@ -67,7 +67,7 @@ const ParserListMap = new Map([
   ],
   [['md'], ['naive', 'qa', 'knowledge_graph']],
   [['json'], ['naive', 'knowledge_graph']],
-  [['eml'], ['email']]
+  [['eml'], ['email']],
 ]);
 
 const getParserList = (