ci(workflow): move 'generate_cli_screenshots' steps to 'docspublish'

[marcosdotme]

Since the purpose is to updated the CLI screenshots on Github Pages, combining this two workflows makes sense.

Closes: #1125

Description

Checklist

• Add test cases to all the changes you introduce (not applicable)
• Run ./scripts/format and ./scripts/test locally to ensure this change passes linter check and test (not applicable)
• Test the changes on the local machine manually
• Update the documentation for the changes (not applicable)

Expected behavior

After every push to master branch, this Github Action Workflow will be triggered and will update the CLI screenshots and also updated the images on Github Pages (if any change is detected).

Steps to Test This Pull Request

I tested manually using an clone of commitizen repo.

General view of workflow:

Update CLI screenshots using the scripts/gen_cli_help_screenshots.py (I add ci_v3 to command descriptions just to workflow detect changes and to maintain traceability):

Update the images on Github Pages:

Image successfully updated on Github Pages:

Relevant changes (@Lee-W)

• Renamed the workflow generate-cli-screenshots to update-cli-screenshots
• Added [skip ci] in the description of the commit generated by the job update-cli-screenshots. The final step of this job is create an commit and push to master. And the workflow is triggered by pushes to master, so if we not add [skip ci], the workflow starts an infinite loop
• Add step "Pull latest changes" to capture the commit maded by update-cli-screenshots

[marcosdotme]

@Lee-W This PR refers to requested changes on #1122

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.54%. Comparing base (120d514) to head (4f0569d).
Report is 321 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1126      +/-   ##
==========================================
+ Coverage   97.33%   97.54%   +0.20%     
==========================================
  Files          42       55      +13     
  Lines        2104     2486     +382     
==========================================
+ Hits         2048     2425     +377     
- Misses         56       61       +5     

Flag	Coverage Δ
unittests	97.54% <ø> (+0.20%)	⬆️

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[Lee-W]

Mostly good. Left a minor nitpick.