Bump serenity from 0.11.5 to 0.11.6

Bumps [serenity](https://github.com/serenity-rs/serenity) from 0.11.5 to 0.11.6.
- [Release notes](https://github.com/serenity-rs/serenity/releases)
- [Changelog](https://github.com/serenity-rs/serenity/blob/current/CHANGELOG.md)
- [Commits](serenity-rs/serenity@v0.11.5...v0.11.6)

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

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -16,7 +16,7 @@ tokio = {version = "1.28.2", features = ["rt-multi-thread", "macros"] }
 async-trait = "0.1.48"
 
 [dependencies.serenity]
-version = "0.11.5"
+version = "0.11.6"
 default-features = false
 features = [
 	"client",