doc: Adds ec2:DescribeVpcEndpoints to make examples/private-endpoint/privateEndpointV2.json work

Author: EspenAlbert

examples/execution-role.yaml

@@ -29,6 +29,7 @@ Resources:
                   - "secretsmanager:GetSecretValue"
                   - "secretsmanager:PutSecretValue"
                   - "ec2:CreateVpcEndpoint"
+                  - "ec2:DescribeVpcEndpoints"
                   - "ec2:DeleteVpcEndpoints"
                   - "cloudformation:CreateResource"
                   - "cloudformation:DeleteResource"