Update check-releases.yml

.github/workflows/check-releases.yml

@@ -9,6 +9,9 @@ on:
 jobs:
   check:
     runs-on: ubuntu-latest
+    env:
+      # https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/
+      ACTIONS_ALLOW_UNSECURE_COMMANDS: true
     steps:
     - name: Get latest Hugo version
       # https://gist.github.com/lukechilds/a83e1d7127b78fef38c2914c4ececc3c