Fix:Agent running message i10n (#7635)

### What problem does this PR solve?

Close #7612

### Type of change

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

web/src/locales/en.ts

@@ -1262,6 +1262,7 @@ This delimiter is used to split the input text into several text pieces echo of
       knowledgeBasesTip:
         'Select the knowledge bases to associate with this chat assistant, or choose variables containing knowledge base IDs below.',
       knowledgeBaseVars: 'Knowledge base variables',
+      runningHintText: 'is running...🕞',
     },
   },
 };