[Snyk] Security upgrade certifi from 2021.10.8 to 2023.7.22

[eapolinario]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `pip` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • doc-requirements.txt

Vulnerabilities that will be fixed

By pinning:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	471/1000 Why? Recently disclosed, Has a fix available, CVSS 3.7	Improper Following of a Certificate's Chain of Trust SNYK-PYTHON-CERTIFI-5805047	certifi: 2021.10.8 -> 2023.7.22	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the affected dependencies could be upgraded.

Check the changes in this PR to ensure they won't cause issues with your project.

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[codecov]

Codecov Report

Merging #416 (fd5a5d3) into master (145bc5c) will increase coverage by 0.77%.
The diff coverage is n/a.

❗ Current head fd5a5d3 differs from pull request most recent head 2bb82a8. Consider uploading reports for the commit 2bb82a8 to get more accurate results

@@            Coverage Diff             @@
##           master     #416      +/-   ##
==========================================
+ Coverage   66.86%   67.63%   +0.77%     
==========================================
  Files         145      145              
  Lines        6271     5234    -1037     
==========================================
- Hits         4193     3540     -653     
+ Misses       1796     1412     -384     
  Partials      282      282              

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see 134 files with indirect coverage changes