fixed ref

Author: nc-shahidazim

.github/workflows/stage-3-build-images-devtest.yaml

@@ -63,9 +63,9 @@ jobs:
       - name: Checkout dtos-devops-templates repository
         uses: actions/checkout@v6
         with:
-          repository: NHSDigital/dtos-devops-templates@feat/DTOSS-12154-disable-sas
+          repository: NHSDigital/dtos-devops-templates
           path: templates
-          ref: main
+          ref: feat/DTOSS-12154-disable-sas
 
       - name: Determine which Docker container(s) to build
         id: get-function-names