Add repositoryAlias parameter to CI configuration

publish-build-assets.yml added this as a required parameter and the CI build is currently failing without it

Author: marcpopMSFT

.vsts-ci.yml

@@ -284,6 +284,7 @@ extends:
             publishUsingPipelines: true
             publishAssetsImmediately: true
             isAssetlessBuild: true
+            repositoryAlias: self
             pool:
               name: $(DncEngInternalBuildPool)
               image: 1es-windows-2022