PR - Adding imagePullSecrets into the template spec gha-runner-scale-set/v… (#32094)

Co-authored-by: Siara <108543037+SiaraMist@users.noreply.github.com>

content/actions/hosting-your-own-runners/managing-self-hosted-runners-with-actions-runner-controller/deploying-runner-scale-sets-with-actions-runner-controller.md

@@ -397,6 +397,8 @@ template:
         image: "custom-registry.io/actions-runner:latest"
         imagePullPolicy: Always
         command: ["/home/runner/run.sh"]
+    imagePullSecrets:
+      - name: <registry-secret-name>
 ```
 
 {% data reusables.actions.actions-runner-controller-helm-chart-options %}