Update ci.yml

Author: bjornharrtell

.github/workflows/ci.yml

@@ -23,6 +23,7 @@ jobs:
     - run: npm test
     - name: action-slack
       uses: 8398a7/[email protected]
+      if: ${{ github.event_name != 'pull_request'}}
       with:
         status: ${{ job.status }}
         fields: repo,message,commit,author,action,eventName,ref,workflow,job,took