test: Added release-assets.githubusercontent.com to govulncheck.yml.

Author: skyzyx

.github/workflows/govulncheck.yml

@@ -52,6 +52,7 @@ jobs:
             proxy.golang.org:443
             registry.npmjs.org:443
             rekor.sigstore.dev:443
+            release-assets.githubusercontent.com:443
             releases.hashicorp.com:443
             storage.googleapis.com:443
             sum.golang.org:443