Update readme, release v0.3

Author: ravwojdyla

README.md

@@ -14,18 +14,20 @@ jobs:
       label: ${{ steps.create-runner.outputs.label }}
     steps:
       - id: create-runner
-        uses: related-sciences/gce-github-runner@v0.2
+        uses: related-sciences/gce-github-runner@v0.3
         with:
           token: ${{ secrets.GH_SA_TOKEN }}
           project_id: ${{ secrets.GCP_PROJECT_ID }}
           service_account_key: ${{ secrets.GCP_SA_KEY }}
+          image_project: ubuntu-os-cloud
+          image_family: ubuntu-1804-lts
 
   test:
     needs: create-runner
     runs-on: ${{ needs.create-runner.outputs.label }}
     steps:
       - run: echo "This runs on the GCE VM"
-      - uses: related-sciences/gce-github-runner@v0.2
+      - uses: related-sciences/gce-github-runner@v0.3
         with:
           command: stop
         if: always()