ci: bump peter-evans/repository-dispatch from 3 to 4 (#710)

Bumps [peter-evans/repository-dispatch](https://github.com/peter-evans/repository-dispatch) from 3 to 4.
- [Release notes](https://github.com/peter-evans/repository-dispatch/releases)
- [Commits](peter-evans/repository-dispatch@v3...v4)

---
updated-dependencies:
- dependency-name: peter-evans/repository-dispatch
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/update-ns.yml

@@ -12,7 +12,7 @@ jobs:
     name: Dispatch
     runs-on: ubuntu-latest
     steps:
-      - uses: peter-evans/repository-dispatch@v3
+      - uses: peter-evans/repository-dispatch@v4
         with:
           repository: u-wave/federation
           token: ${{secrets.SCHEMA_ACCESS_TOKEN}}