fix: not checked require_summary of duckduckgo search raise error (#5303)

api/core/tools/provider/builtin/duckduckgo/tools/ddgo_search.yaml

@@ -54,7 +54,6 @@ parameters:
     form: form
   - name: require_summary
     type: boolean
-    required: true
     default: false
     label:
       en_US: Require Summary