Use the v1 tag for setup-env-github-action as is done upstream

Author: jsf9k

.github/workflows/build.yml

@@ -256,7 +256,7 @@ jobs:
           # this workflow.
           permissions_monitoring_config: ${{ vars.ACTIONS_PERMISSIONS_CONFIG }}
       - id: setup-env
-        uses: cisagov/setup-env-github-action@develop
+        uses: cisagov/setup-env-github-action@v1
       - uses: actions/checkout@v5
       - id: setup-python
         uses: actions/setup-python@v6