ci: do not mark job as failed for expired firebase instance

.github/workflows/delete-preview.yml

@@ -2,13 +2,15 @@ name: Close PR delete firebase channel
 on:
   pull_request:
     types: [closed]
+
 jobs:
   delete_firebase_channel:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
       - uses: w9jds/[email protected]
+        continue-on-error: true
         with:
           args: hosting:channel:delete pr${{ github.event.number }}-${{ github.head_ref }} --force
         env: