update publish (#83)

Author: saikrishna321

.github/workflows/npm-publish.yml

@@ -12,7 +12,7 @@ on:
 jobs:
   release:
     if: github.event.action != 'labeled'
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - name: Post bumpr status comment