Fix wrong IAM permissions in docs for the AWS Parameter Store (#1949)

Signed-off-by: Tobias Germer <tobias.germer@tui.com>

docs/provider/aws-parameter-store.md

@@ -31,9 +31,8 @@ Create a IAM Policy to pin down access to secrets matching `dev-*`, for further
       "Effect": "Allow",
       "Action": [
         "ssm:GetParameter",
-        "ssm:GetParameterWithContext",
-        "ssm:ListTagsForResourceWithContext",
-        "ssm:DescribeParametersWithContext",
+        "ssm:ListTagsForResource",
+        "ssm:DescribeParameters"
       ],
       "Resource": "arn:aws:ssm:us-east-2:1234567889911:parameter/dev-*"
     }