chore(deps): bump ra from 3.1.8 to 3.1.9

Bumps [ra](https://github.com/rabbitmq/ra) from 3.1.8 to 3.1.9.
- [Release notes](https://github.com/rabbitmq/ra/releases)
- [Commits](rabbitmq/ra@v3.1.8...v3.1.9)

---
updated-dependencies:
- dependency-name: ra
  dependency-version: 3.1.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]