update selfhost runner logic1

Author: sandeepgupta12

.github/workflows/_linux-build.yml

@@ -117,8 +117,8 @@ jobs:
     strategy:
       matrix:
         runner:
-          - { type: ppc64le, labels: 'self-hosted, linux, ppc64le' }
-          - { type: default, labels: '${{ inputs.runner_prefix }} ${{ inputs.runner }}' }
+          - { type: ppc64le, labels: '[self-hosted, linux, ppc64le]' }
+          - { type: default, labels: '[${{ inputs.runner_prefix }} ${{ inputs.runner }}]' }
 
     steps:
 

.github/workflows/ppc64le.yml

@@ -15,7 +15,7 @@ concurrency:
 jobs:
   linux-ppc64le-docker-image-build:
     name: Build docker image for ppc64le
-    runs-on: [self-hosted, linux, ppc64le]
+    runs-on: pytorch-runner
 
     steps:
       - name: Checkout repository