Bump Submodule/github/rest-api-description from a0508ce to b2ff88e

Bumps [Submodule/github/rest-api-description](https://github.com/github/rest-api-description) from `a0508ce` to `b2ff88e`.
- [Release notes](https://github.com/github/rest-api-description/releases)
- [Commits](github/rest-api-description@a0508ce...b2ff88e)

---
updated-dependencies:
- dependency-name: Submodule/github/rest-api-description
  dependency-type: direct:production
...

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

Author: dependabot[bot]