fix: chunk editor allows update image only if chunk type is image (#12210)

### What problem does this PR solve?

Disallow updating image on non-image chunk in chunk editor.

### Type of change

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

web/src/pages/chunk/parsed-result/add-knowledge/components/knowledge-chunk/components/chunk-creating-modal/index.tsx

@@ -168,6 +168,7 @@ const ChunkCreatingModal: React.FC<IModalProps<any> & kFProps> = ({
             />
           )}
 
+          {isEditMode && form.getValues('doc_type_kwd') === 'image' && (
             <FormField
               control={form.control}
               name="image"
@@ -205,6 +206,7 @@ const ChunkCreatingModal: React.FC<IModalProps<any> & kFProps> = ({
                 </FormItem>
               )}
             />
+          )}
 
           <FormField
             control={form.control}