Bump certifi from 2021.5.30 to 2023.7.22

Bumps [certifi](https://github.com/certifi/python-certifi) from 2021.5.30 to 2023.7.22.
- [Commits](https://github.com/certifi/python-certifi/compare/2021.05.30...2023.07.22)

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

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

requirements.txt

@@ -2,7 +2,7 @@ appdirs==1.4.4
 APScheduler==3.6.3
 black==21.5b1
 cachetools==4.2.2
-certifi==2021.5.30
+certifi==2023.7.22
 chardet==4.0.0
 click==8.0.1
 discord-webhook==0.14.0