ci: fix output source

.github/workflows/_push-entrypoint.yaml

@@ -164,8 +164,8 @@ jobs:
       - compile
     uses: ./.github/workflows/run_emqx_app_tests.yaml
     with:
-      runner: ${{ needs.sanity-checks.outputs.runner }}
-      builder: ${{ needs.sanity-checks.outputs.builder }}
+      runner: ${{ needs.prepare.outputs.runner }}
+      builder: ${{ needs.prepare.outputs.builder }}
       before_ref: ${{ github.event.before }}
       after_ref: ${{ github.sha }}