Adapt label-sync workflow to new version of upstream workflow

.github/workflows/sync-labels.yml

@@ -1,16 +1,22 @@
 name: Sync labels
 on:
     workflow_dispatch: {}
-    push:
-        branches:
-            - develop
-        paths:
-            - .github/labels.yml
+    # Disabled while we're setting this up and testing it
+    # schedule:
+    #     - cron: "0 2 * * *" # 2am every day
+    # push:
+    #     branches:
+    #         - develop
+    #     paths:
+    #         - .github/labels.yml
 jobs:
     sync-labels:
         uses: vector-im/element-meta/.github/workflows/sync-labels.yml@develop
         with:
             LABELS: |
+                vector-im/element-meta
                 .github/labels.yml
+            DELETE: true
+            WET: false
         secrets:
             ELEMENT_BOT_TOKEN: ${{ secrets.ELEMENT_BOT_TOKEN }}