deps: bump execa from 8.0.1 to 9.0.2 (#453)

* deps: bump execa from 8.0.1 to 9.0.2

Bumps [execa](https://github.com/sindresorhus/execa) from 8.0.1 to 9.0.2.
- [Release notes](https://github.com/sindresorhus/execa/releases)
- [Commits](sindresorhus/execa@v8.0.1...v9.0.2)

---
updated-dependencies:
- dependency-name: execa
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* `signal` -> `cancelSignal`

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Julian Gruber <julian@juliangruber.com>

lib/zinnia.js

@@ -364,7 +364,7 @@ export async function run ({
           STATE_ROOT,
           CACHE_ROOT
         },
-        signal
+        cancelSignal: signal
       }
     )
     childProcesses.push(Object.assign(childProcess, { moduleName: module }))