Make main workflow clear

[JuanVqz]

• [x] Add an entry to CHANGELOG.md that links to this PR under the "main (unreleased)" heading.

Description:

I made the main workflow simpler and easy to understand, if you also need to add a next ruby version, just need to add it in the matrix array. ex. ruby-version: [2.5, 2.6, 2.7, 3.0, 3.1]

I will abide by the code of conduct.

[codecov[bot]]

Codecov Report

Merging #99 (ff9132d) into main (733dd4f) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #99   +/-   ##
=======================================
  Coverage   98.27%   98.27%           
=======================================
  Files          25       25           
  Lines         463      463           
=======================================
  Hits          455      455           
  Misses          8        8           

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[JuanVqz]

This is ready to be review, :+1: