[pip](deps): Bump python-dateutil from 2.8.2 to 2.9.0

Bumps [python-dateutil](https://github.com/dateutil/dateutil) from 2.8.2 to 2.9.0.
- [Release notes](https://github.com/dateutil/dateutil/releases)
- [Changelog](https://github.com/dateutil/dateutil/blob/master/NEWS)
- [Commits](dateutil/dateutil@2.8.2...2.9.0)

---
updated-dependencies:
- dependency-name: python-dateutil
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -15,7 +15,7 @@ asyncpg = "^0.29.0"
 discord-ext-menus = {git = "https://github.com/Rapptz/discord-ext-menus", rev = "8686b5d1bbc1d3c862292eb436ab630d6e9c9b53"}
 psutil = "^5.9.8"
 pygit2 = "^1.14.1"
-python-dateutil = "^2.8.2"
+python-dateutil = "^2.9.0"
 click = "^8.1.7"
 async-lru = "^2.0.4"
 msgspec = "^0.18.6"