Add cron job to stale branch workflow

.github/workflows/remove-stale-branches.yml

@@ -1,12 +1,7 @@
-on: 
-  workflow_dispatch: # this will eventually be a cron job - for now it is used in manual testing
-    inputs:
-      days_before_stale:
-        type: number
-        default: 30
-      days_before_delete:
-        type: number
-        default: 14
+name: 'Remove stale branches'
+on:
+  schedule:
+    - cron: '0 0 * * 1-5'
 
 jobs:
   remove-stale-branches:
@@ -16,8 +11,9 @@ jobs:
       - uses: fpicalausa/[email protected]
         with:
           dry-run: true
-          days-before-branch-stale: ${{ inputs.days_before_stale }}
-          days-before-branch-delete: ${{ inputs.days_before_delete }}
+          days-before-branch-stale: 30
+          days-before-branch-delete: 14
           stale-branch-message: "@{author} The branch [{branchName}]({branchUrl}) hasn't been updated in the last 30 days and is marked as stale. It will be removed in 14 days.\r\nIf you want to keep this branch around, delete this comment or add new commits to this branch."
           exempt-protected-branches: true
           exempt-branches-regex: "^(release\\/|feature\\/|poc\\/).*"
+          operations-per-run: 30