chore(deps): update hikari requirement from ~=2.0.0 to ~=2.1.0

Updates the requirements on [hikari](https://github.com/hikari-py/hikari) to permit the latest version.
- [Release notes](https://github.com/hikari-py/hikari/releases)
- [Changelog](https://github.com/hikari-py/hikari/blob/master/CHANGELOG.md)
- [Commits](hikari-py/hikari@2.0.0...2.1.0)

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

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

pyproject.toml

@@ -25,7 +25,7 @@ classifiers = [
     "Topic :: Software Development :: Libraries :: Python Modules",
     "Typing :: Typed",
 ]
-dependencies = ["hikari~=2.0.0", "async-timeout>=4, <5"]
+dependencies = ["hikari~=2.1.0", "async-timeout>=4, <5"]
 dynamic = ["version", "description"]
 
 [project.urls]