Use reusable workflow for refresh lockfile workflow

.github/workflows/refresh-lockfiles.yml

@@ -1,21 +1,18 @@
-# Updates the environment lock files. See called workflow for more details.
+# Updates the environment lock files. See the called workflow in the
+# scitools/reusable_workflows repo for more details.
 
 name: Refresh Lockfiles
 
 
 on:
   workflow_dispatch:
-  #schedule:
+  schedule:
     # Run once a week on a Saturday night 
     # N.B. "should" be quoted, according to
     # https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#onschedule
-    #- cron: "1 0 * * 6"
-  push:
+    - cron: "1 0 * * 6"
 
 jobs:
   refresh_lockfiles:
-    uses: lbdreyer/reusable_workflows/.github/workflows/refresh-lockfiles.yml@main
+    uses: scitools/reusable_workflows/.github/workflows/refresh-lockfiles.yml@main
     secrets: inherit
-
-
-