goreportcard: add wildcard egress policy

`*.actions.githubusercontent.com`

Author: waybackarchiver

.github/workflows/reusable-goreportcard.yml

@@ -37,6 +37,7 @@ jobs:
             github.com:443
             api.github.com:443
             goreportcard.com:443
+            '*.actions.githubusercontent.com'
 
       - name: Check out code base
         if: github.event_name == 'push'