add buypass test

.github/workflows/Ubuntu.yml

@@ -28,6 +28,10 @@ jobs:
            CA_ECDSA: "ZeroSSL ECC Domain Secure Site CA"
            CA: "ZeroSSL RSA Domain Secure Site CA"
            CA_EMAIL: "githubtest@acme.sh"
+        - TEST_ACME_Server: "https://api.test4.buypass.no/acme/directory"
+           CA_ECDSA: "Buypass Class 2 Test4 CA 5"
+           CA: "Buypass Class 2 Test4 CA 5"
+           CA_EMAIL: "githubtest@acme.sh"
     runs-on: ubuntu-latest
     env:
       TEST_LOCAL: 1