fix(ci): add environment to docs-preview (#4677)

Author: jsjoeio

.github/workflows/docs-preview.yaml

@@ -21,6 +21,7 @@ jobs:
   preview:
     name: Docs preview
     runs-on: ubuntu-20.04
+    environment: CI
     steps:
       - name: Cancel Previous Runs
         uses: styfle/[email protected]