fix: fix integ test for mcp eclicitation_server (strands-agents#1234)

Author: JackYPCOnline

tests_integ/mcp/elicitation_server.py

@@ -19,6 +19,7 @@ async def approval_tool() -> str:
             The elicitation result from the user.
         """
         request = ElicitRequest(
+            method="elicitation/create",
             params=ElicitRequestParams(
                 message="Do you approve",
                 requestedSchema={