Fix notification message (#554)

.github/workflows/check-helm-chart-resources.yaml

@@ -29,7 +29,7 @@ jobs:
         env:
           SLACK_CHANNEL: C06GJA56C5S # selfhosted-internal
         run: |
-          curl -F "text=:warning: Hey <!here>! Self Hosted Helm Chart requested resources have changed in <https://github.com/CartoDB/carto-selfhosted-helm/pull/${{ github.event.pull_request.number }}|this PR>. Check that the documentation is updated with the new values!" \
+          curl -F "text=:warning: Hey <!here>! Self Hosted Helm Chart requested resources have changed. Check that the documentation is updated with the new values!" \
            -F "channel=${SLACK_CHANNEL}" \
            -H "Authorization: Bearer ${{ secrets.SLACK_KEY }}" \
            -X POST https://slack.com/api/chat.postMessage