Bump discord-py from 2.2.2 to 2.3.1

Bumps [discord-py](https://github.com/Rapptz/discord.py) from 2.2.2 to 2.3.1.
- [Commits](Rapptz/discord.py@v2.2.2...v2.3.1)

---
updated-dependencies:
- dependency-name: discord-py
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -1,6 +1,6 @@
 asyncio==3.4.3
 colorama==0.4.6
-discord.py==2.2.2
+discord.py==2.3.1
 emoji==2.2.0
 prettytable==3.6.0
 psutil==5.9.4