Fixed invoke component parameters #4236 (#4237)

### What problem does this PR solve?

to fixed issue https://github.com/infiniflow/ragflow/issues/4236

### Type of change

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

agent/component/invoke.py

@@ -57,7 +57,7 @@ class Invoke(ComponentBase, ABC):
                 _, out = cpn.output(allow_partial=False)
                 args[para["key"]] = "\n".join(out["content"])
             else:
-                args[para["key"]] = "\n".join(para["value"])
+                args[para["key"]] = para["value"]
 
         url = self._param.url.strip()
         if url.find("http") != 0: