ci: replace curl with gh (preinstalled)

.github/workflows/ci.yml

@@ -30,7 +30,8 @@ jobs:
       - name: Send repository dispatch
         if: ${{ github.event_name == 'push' && github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}
         run: |
-          curl -X POST -H "Accept: application/vnd.github.v3+json" \
-            -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
-            https://api.github.com/repos/vvirtues/bucket/dispatches \
-            -d '{"event_type": "discordo-ci-completed"}'
+          gh api \
+            --method POST \
+            -H "Accept: application/vnd.github+json" \
+            /repos/vvirtues/bucket/dispatches \
+            -f "event_type=discordo-ci-completed"