Add plugin versions informations readme docs

What does this MR do?

Context

In the context of #21 (closed). The purpose of this MR is to add information about the qgis version jump so that the plugin can be used up to date.

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Checklists

Author's checklist

• I've read the contribution guidelines and affirm:
  • my branch has been created from main
  • if the code is not completely achieved, I apply the Draft/WIP prefix
  • the DOD is satisfied specially tests
• assign myself (the MR creator will automatically be assigned)
• the box Delete source branch when merge request is accepted. is checked

Reviewer's checklist

• assign yourself as Reviewer and remember that others developers can comment too