add condition to Action

The minify-map-json action is causing itself to run every time its PRs are merged.
This hopefully will stop that happening, but ignoring anything with an 'automated' label and then applying that label when pushing the PR

.github/workflows/minify-map-json.yml

@@ -8,6 +8,7 @@ on:
   workflow_dispatch:
 jobs:
   processJson:
+    if: ${{ github.event.label.name != 'automated' }}
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2