Update gha-runner-scale-set Docker tag to v0.12.1

Author: renovate[bot]

github-runners/kustomization.yaml

@@ -11,7 +11,7 @@ helmCharts:
     repo: oci://ghcr.io/actions/actions-runner-controller-charts
     releaseName: actions-runner-set
     namespace: github-actions
-    version: 0.11.0
+    version: 0.12.1
     includeCRDs: true
     valuesFile: values.yaml