build(deps): bump submodules/rest-api-specs from 4aad50a to db38eb1

Bumps [submodules/rest-api-specs](https://github.com/Azure/azure-rest-api-specs) from `4aad50a` to `db38eb1`.
- [Release notes](https://github.com/Azure/azure-rest-api-specs/releases)
- [Commits](Azure/azure-rest-api-specs@4aad50a...db38eb1)

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

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