pull in upstream skupper latest

Author: jiridanek

.github/workflows/build.yaml

@@ -717,7 +717,7 @@ jobs:
         uses: ./.github/actions/skupper-integration-tests
         with:
           qdrouterdImage: "local/skupper-router:local"
-          skupperGitRef: "403653c783a24127bade2ea0c838a64ff734e64e"
+          skupperGitRef: "28fbd7bbec704c8418882c32016aec6fbcb3df99"
 
   rpm:
     name: 'Build and test RPM (${{ matrix.container }}:${{ matrix.containerTag }})'