Use the release environment in publish-docs (#18727)

See astral-sh/ty#3147

Author: zanieb

.github/workflows/publish-docs.yml

@@ -21,6 +21,8 @@ permissions: {}
 
 jobs:
   mkdocs:
+    environment:
+      name: release
     runs-on: ubuntu-latest
     env:
       VERSION: ${{ (inputs.plan != '' && fromJson(inputs.plan).announcement_tag) || inputs.ref }}