improve runner

Author: Roman

.github/workflows/push-nodes.yml

@@ -9,7 +9,7 @@ jobs:
   build-and-merge:
     permissions:
       pull-requests: write
-    runs-on: ubuntu-latest
+    runs-on: SubtensorCI
 #    if: github.event.pull_request.merged
     steps:
       - name: Checkout code