Bump certifi from 2021.5.30 to 2023.7.22 in /scheduler

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

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

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

scheduler/requirements.txt

@@ -1,6 +1,6 @@
 ../crawling_utils/
 schedule==1.1.0
-certifi==2021.5.30
+certifi==2023.7.22
 chardet==4.0.0
 idna==2.10
 kafka-python==2.0.2