Add allowed endpoint

Author: komer3

Diff for: .github/workflows/build_test_ci.yml

@@ -133,6 +133,7 @@ jobs:
           api.github.com:443
           github.com:443
           gcr.io:443
+          ghcr.io:443
           proxy.golang.org:443
           sum.golang.org:443
           *.githubusercontent.com:443