ci: downgrade StackHead to latest release

Author: saitho

.github/workflows/test.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Print Ansible and Python version
         run: ansible --version && python --version
       - name: Get latest StackHead version
-        run: ansible-galaxy collection install git+https://github.com/getstackhead/stackhead.git,next -f
+        run: ansible-galaxy collection install git+https://github.com/getstackhead/stackhead.git,v1.2.0 -f
       - run: ansible-playbook ./__tests__/test-tf-generation.yml
 
   checkLabel: