build(deps): bump submodules/rest-api-specs from c9b146c to `4ce13e…

…8` (#4363)

Bumps [submodules/rest-api-specs](https://github.com/Azure/azure-rest-api-specs) from `c9b146c` to `4ce13e8`.
- [Release notes](https://github.com/Azure/azure-rest-api-specs/releases)
- [Commits](Azure/azure-rest-api-specs@c9b146c...4ce13e8)

---
updated-dependencies:
- dependency-name: submodules/rest-api-specs
  dependency-type: direct:production
...

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