use multinode with opentofu

Author: elelaysh

.github/workflows/stackhpc-multinode.yml

@@ -95,7 +95,7 @@ jobs:
   multinode:
     name: Multinode
     needs: github_user_ssh_keys
-    uses: stackhpc/stackhpc-openstack-gh-workflows/.github/workflows/multinode.yml@1.6.0
+    uses: stackhpc/stackhpc-openstack-gh-workflows/.github/workflows/multinode.yml@feat/opentofu
     with:
       multinode_name: ${{ inputs.multinode_name }}
       os_distribution: ${{ inputs.os_distribution }}