Bump certifi from 2021.5.30 to 2022.12.7 in /scanners/dns-scanner

Bumps [certifi](https://github.com/certifi/python-certifi) from 2021.5.30 to 2022.12.7.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](certifi/python-certifi@2021.05.30...2022.12.07)

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

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

scanners/dns-scanner/requirements.txt

@@ -7,7 +7,7 @@
 
 -i https://pypi.org/simple
 asyncio-nats-client==0.11.4
-certifi==2021.5.30
+certifi==2022.12.7
 cffi==1.14.6
 charset-normalizer==2.0.6; python_version >= '3'
 checkdmarc==4.4.1