Update tool.py (#12472)

In the GoogleSerperResults class, the name field is defined as
'google_serrper_results_json'. This looks like a typo, and perhaps
should be 'google_serper_results_json'.

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libs/langchain/langchain/tools/google_serper/tool.py

@@ -43,7 +43,7 @@ class GoogleSerperResults(BaseTool):
     """Tool that queries the Serper.dev Google Search API
     and get back json."""
 
-    name: str = "google_serrper_results_json"
+    name: str = "google_serper_results_json"
     description: str = (
         "A low-cost Google Search API."
         "Useful for when you need to answer questions about current events."