Release workflow now access release environment

I've configured a release environment up on GitHub.
This environment is only referenced by the release workflow.
The environment holds necessary secrets to for deployment.
(which I've recreated due to a codecov security breach)
This moves these secrets from the repository scope to the release
workflow scope.

Author: lread

.github/workflows/release.yml

@@ -4,6 +4,8 @@ on:
 
 jobs:
   release:
+    environment: release
+
     runs-on: ubuntu-latest
     # I do not know of a way to restrict to the main branch so try to skip the whole job if
     # user selected some other branch from GitHub Actions GUI