fix: force evaluation

Author: Lucki2g

Setup/azure-pipelines-external.yml

@@ -100,7 +100,7 @@ stages:
               websitePassword: $(WebsitePassword)
               websiteSessionSecret: $(WebsiteSessionSecret)
               websiteName: $(WebsiteName)
-              resourceNameTemplate: ${{ coalesce(variables.AzureServiceNameTemplate, '') }}
+              resourceNameTemplate: '$(AzureServiceNameTemplate)'
               adoOrganizationUrl: $(System.CollectionUri)
               adoProjectName: $(System.TeamProject)
               adoRepositoryName: ${{ coalesce(variables.AdoRepositoryName, '') }}