Add missing quotes

Author: seunghun1ee

.github/workflows/stackhpc-container-image-build.yml

@@ -171,7 +171,7 @@ jobs:
           if ${{ inputs.push }} == 'true'; then
             args="$args --push"
           fi
-          if [[ ${{ github.event.inputs.regexes }} == "" ]]; then
+          if [[ "${{ github.event.inputs.regexes }}" == "" ]]; then
             args="$args -e kolla_build_neutron_ovs=true"
           fi
           source venvs/kayobe/bin/activate &&