editoast: bump redis from 0.27.5 to 0.27.6 in /editoast

Bumps [redis](https://github.com/redis-rs/redis-rs) from 0.27.5 to 0.27.6.
- [Release notes](https://github.com/redis-rs/redis-rs/releases)
- [Commits](redis-rs/redis-rs@redis-0.27.5...redis-0.27.6)

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

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

Author: dependabot[bot]