build(deps): bump submodules/rest-api-specs from c6a6742 to 930e803 (#4985)

Bumps [submodules/rest-api-specs](https://github.com/Azure/azure-rest-api-specs) from `c6a6742` to `930e803`.
- [Release notes](https://github.com/Azure/azure-rest-api-specs/releases)
- [Commits](Azure/azure-rest-api-specs@c6a6742...930e803)

---
updated-dependencies:
- dependency-name: submodules/rest-api-specs
  dependency-version: 930e8030f5058d947fea4e2640725baab8a4561a
  dependency-type: direct:production
...

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