ci: cancel job if not triggered on tag

azure-pipelines-rc.yml

@@ -14,6 +14,23 @@ steps:
   displayName: 'Output tag'
   env:
     TAG: $(TAG)
+- task: PowerShell@2
+  if: startsWith(variables['Build.SourceBranch'], 'refs/pull/')
+  inputs:
+    targetType: 'inline'
+    script: |
+      $uri = "https://dev.azure.com/thecodemanual/DevOps Manual/_apis/build/builds/$(Build.BuildId)/timeline?api-version=5.1"
+
+      Write-Host $uri
+
+      # Invoke the REST call
+      $build = Invoke-RestMethod -Uri $uri -Method Get -Headers @{Authorization = "Bearer $(System.AccessToken)"} -ContentType "application/json"
+
+      $taskResult = $build.records | Where-Object {$_.name -eq "ConditionalStep" } | Select-Object result
+
+      Write-Host $taskResult.result
+
+    pwsh: true
 - script: yarn install --ignore-engines && npx playwright install && yarn global add ts-node
   displayName: 'Install dependencies'
 - script: ts-node scripts/downloadGithubReleasePackage.ts