overcloud-host-image-build.yml: fix Output image tag of the builder

Author: elelaysh

.github/workflows/overcloud-host-image-build.yml

@@ -75,7 +75,9 @@ jobs:
       - name: Output image tag of the builder
         id: builder_image_tag
         run: |
-          echo image_tag=$(grep stackhpc_rocky_9_overcloud_host_image_version: etc/kayobe/pulp-host-image-versions.yml | awk '{print $2}') >> $GITHUB_OUTPUT
+          image_tag="$(grep stackhpc_rocky_9_overcloud_host_image_version: etc/kayobe/pulp-host-image-versions.yml | awk '{print $2}')"
+          echo "image_tag=${image_tag}" | tee -a "$GITHUB_OUTPUT"
+        working-directory: ${{ github.workspace }}/src/kayobe-config
 
       - name: Determine OpenStack release
         id: openstack_release