build(deps): bump submodules/rest-api-specs from b01fe8a to b5d78da

Bumps [submodules/rest-api-specs](https://github.com/Azure/azure-rest-api-specs) from `b01fe8a` to `b5d78da`.
- [Release notes](https://github.com/Azure/azure-rest-api-specs/releases)
- [Commits](Azure/azure-rest-api-specs@b01fe8a...b5d78da)

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

Signed-off-by: dependabot[bot] <[email protected]>