docs: add docs for 3rd party module cz-github-jira-conventional

[falko-apheris]

Description

Add documentation for the 3rd party module https://github.com/apheris/cz-github-jira-conventional

Additional context

This addon extends the commitizen tools by:

• require a Jira issue id in the commit message
• create links to GitHub commits in the CHANGELOG.md
• create links to Jira issues in the CHANGELOG.md

[codecov]

Codecov Report

Merging #413 (dc6e4b0) into master (33c3c49) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #413   +/-   ##
=======================================
  Coverage   97.90%   97.90%           
=======================================
  Files          39       39           
  Lines        1381     1383    +2     
=======================================
+ Hits         1352     1354    +2     
  Misses         29       29           

Flag	Coverage Δ
unittests	97.90% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...en/cz/conventional_commits/conventional_commits.py	100.00% <ø> (ø)
commitizen/defaults.py	100.00% <ø> (ø)
commitizen/__version__.py	100.00% <100.00%> (ø)
commitizen/commands/commit.py	98.33% <100.00%> (+0.05%)	⬆️

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