Run tests on Terraform 1.11

Author: Sander0542

.github/workflows/test.yml

@@ -65,6 +65,7 @@ jobs:
           - '1.8.*'
           - '1.9.*'
           - '1.10.*'
+          - '1.11.*'
     services:
       nginxproxymanager:
         image: docker.io/jc21/nginx-proxy-manager:latest