Temp: Use dev branch of multinode workflow

Author: seunghun1ee

.github/workflows/stackhpc-multinode.yml

@@ -63,7 +63,7 @@ name: Multinode
 jobs:
   multinode:
     name: Multinode
-    uses: stackhpc/stackhpc-openstack-gh-workflows/.github/workflows/multinode.yml@1.4.0
+    uses: stackhpc/stackhpc-openstack-gh-workflows/.github/workflows/multinode.yml@ca-choice
     with:
       multinode_name: ${{ inputs.multinode_name }}
       os_distribution: ${{ inputs.os_distribution }}