fix: merge queue action needs container specifier (#890)

Author: dhower-qc

.github/workflows/merge.yml

@@ -6,9 +6,12 @@ on:
   merge_group:
     types: [checks_requested]
   workflow_dispatch:
+env:
+  SINGULARITY: 1
 jobs:
   build-reuse-manifest:
     runs-on: ubuntu-latest
+
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5