Update api.json

Author: dolnna

content/en/api_docs/api.json

@@ -1056,7 +1056,7 @@
             "items": {
               "type": "string"
             },
-            "description": "Specifies the scope of knowledge bases accessible for the current search. Defaults to empty, meaning no knowledge bases are searched."
+            "description": "Specifies the scope of knowledge bases accessible for the current search. Defaults to empty, meaning no knowledge bases are searched.Pass specific Knowledgebase IDs to search within that designated repository; pass "all" to search across all associated knowledgebases within the project."
           },
           "memory_limit_number": {
             "type": "integer",