Revert "temporarily change SsmHook::get_parameter_value doc"

This reverts commit 8308872.

providers/src/airflow/providers/amazon/aws/hooks/ssm.py

@@ -42,7 +42,9 @@ def __init__(self, *args, **kwargs) -> None:
     def get_parameter_value(self, parameter: str, default: str | ArgNotSet = NOTSET) -> str:
         """
         Return the provided Parameter or an optional default; if it is encrypted, then decrypt and mask.
-        See also: https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ssm/client/get_parameter.html#SSM.Client.get_parameter.
+
+        .. seealso::
+            - :external+boto3:py:meth:`SSM.Client.get_parameter`
 
         :param parameter: The SSM Parameter name to return the value for.
         :param default: Optional default value to return if none is found.