Merge pull request #44 from Shopify/ec-env

Add an enviroment to release the gem:

Author: Edouard-chin

.github/workflows/cibuildgem.yaml

@@ -67,6 +67,7 @@ jobs:
         with:
           step: "install"
   release:
+    environment: release
     permissions:
       id-token: write
       contents: read