build(deps): bump certifi from 2018.11.29 to 2023.7.22 in /py-legacy

Bumps [certifi](https://github.com/certifi/python-certifi) from 2018.11.29 to 2023.7.22.
- [Commits](certifi/python-certifi@2018.11.29...2023.07.22)

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

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

py-legacy/requirements.txt

@@ -3,7 +3,7 @@ PyYAML==5.1
 adal==1.2.1
 asn1crypto==0.24.0
 cachetools==3.1.0
-certifi==2018.11.29
+certifi==2023.7.22
 cffi==1.12.2
 chardet==3.0.4
 contextlib2==0.5.5