Bump certifi from 2021.10.8 to 2022.12.7

Bumps [certifi](https://github.com/certifi/python-certifi) from 2021.10.8 to 2022.12.7.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](https://github.com/certifi/python-certifi/compare/2021.10.08...2022.12.07)

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

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

requirement_files/Sphinx.txt

@@ -1,6 +1,6 @@
 alabaster==0.7.12
 Babel==2.9.1
-certifi==2020.6.20
+certifi==2022.12.7
 chardet==3.0.4
 docutils==0.16
 idna==2.10

requirement_files/requests.txt

@@ -1,4 +1,4 @@
-certifi==2020.6.20
+certifi==2022.12.7
 chardet==3.0.4
 idna==2.10
 requests==2.25.1

requirement_files/slacker.txt

@@ -1,4 +1,4 @@
-certifi==2020.6.20
+certifi==2022.12.7
 chardet==3.0.4
 idna==2.10
 requests==2.25.1

requirements_recommended.txt

@@ -3,7 +3,7 @@ appdirs==1.4.4
 asn1crypto==1.4.0
 attrs==21.4.0
 black==22.1.0
-certifi==2021.10.8
+certifi==2022.12.7
 cffi==1.15.0
 cfgv==3.3.1
 chardet==4.0.0