chore(deps): update redis requirement in /examples/using_redis-rs

Updates the requirements on [redis](https://github.com/redis-rs/redis-rs) to permit the latest version.
- [Release notes](https://github.com/redis-rs/redis-rs/releases)
- [Commits](redis-rs/redis-rs@redis-0.26.1...redis-0.27.6)

---
updated-dependencies:
- dependency-name: redis
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/using_redis-rs/Cargo.toml

@@ -6,4 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-redis = "=0.26.1"
+redis = "=0.27.6"