(MAINT) fix failing checkout step on migrate and failed postgres workflows

Author: davidmalloncares

.github/workflows/test-migration.yaml

@@ -71,8 +71,6 @@ jobs:
     steps:
       - name: Checkout Source
         uses: actions/checkout@v4
-        with:
-          ref: ${{ github.head_ref }}
       - name: Activate Ruby 3.1
         uses: ruby/setup-ruby@v1
         with:

.github/workflows/test-replace-failed-postgresql.yaml

@@ -41,9 +41,7 @@ jobs:
         image: [almalinux-cloud/almalinux-8]
     steps:
       - name: Checkout Source
-        uses: actions/checkout@v4
-        with:
-          ref: ${{ github.head_ref }}
+        uses: actions/checkout@v4  
       - name: Activate Ruby 3.1
         uses: ruby/setup-ruby@v1
         with: