Updated to make a repo dispatch (#642)

.github/workflows/on-merged-pr.yml

@@ -12,4 +12,5 @@ jobs:
     steps:
       - name: 'Trigger obscuro-test local testnet tun'
         run: |
-          curl -XPOST -H "Authorization: Bearer ${{ secrets.GH_TOKEN }}" -H "Accept:application/vnd.github" -H "Content-Type:application/json" https://api.github.com/repos/obscuronet/obscuro-test/actions/workflows/local_tests.yml/dispatches --data '{"pr_number": "${{ github.event.number }}" }'
+          curl -XPOST -H "Authorization: Bearer ${{ secrets.GH_TOKEN }}" -H "Accept:application/vnd.github" -H "Content-Type:application/json" https://api.github.com/repos/obscuronet/obscuro-test/dispatches --data '{ "event_type": "merged_pull_request", "client_payload": { "number": ${{ github.event.number }} } }'
+