[Snyk] Security upgrade urllib3 from 1.26.8 to 1.26.18

[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
	496/1000 Why? Recently disclosed, Has a fix available, CVSS 4.2	Information Exposure Through Sent Data SNYK-PYTHON-URLLIB3-6002459	urllib3: 1.26.8 -> 1.26.18	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

All modified lines are covered by tests ✅

Comparison is base (85bfc8f) 75.92% compared to head (dd087b7) 78.48%.

❗ Current head dd087b7 differs from pull request most recent head c63949f. Consider uploading reports for the commit c63949f to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #457      +/-   ##
==========================================
+ Coverage   75.92%   78.48%   +2.55%     
==========================================
  Files          18       18              
  Lines        1458     1250     -208     
==========================================
- Hits         1107      981     -126     
+ Misses        294      212      -82     
  Partials       57       57              

Flag	Coverage Δ
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see 18 files with indirect coverage changes

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