Trunk: Another annotation attempt (#6100)

.github/workflows/nightly.yml

@@ -21,6 +21,7 @@ jobs:
           trunk-token: ${{ secrets.TRUNK_TOKEN }}
 
   trunk_upgrade:
+    # See: https://github.com/trunk-io/trunk-action/blob/v1/readme.md#automatic-upgrades
     name: Trunk Upgrade (PR)
     runs-on: ubuntu-latest
     permissions:
@@ -30,6 +31,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      # See https://github.com/trunk-io/trunk-action/blob/v1/readme.md#automatic-upgrades
       - name: Trunk Upgrade
         uses: trunk-io/trunk-action/upgrade@v1
+        with:
+          base: master