Fix the commit being checked out for tests 🤦

Author: AshleyDumaine

.github/workflows/build_test_ci.yml

@@ -25,7 +25,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha }}
+          ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
       - name: Harden Runner
         uses: step-security/harden-runner@v2
         with:
@@ -64,7 +64,7 @@ jobs:
 
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha }}
+          ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
 
       - name: Set up Go
         uses: actions/setup-go@v5