Add a cron GH workflow that updates a default branch

[sanex3339]

Add a cron GH workflow that updates a default branch

• The workflow is scheduled every hour
• It uses the value of vars.CURRENT_VERSION that is the org-level variable
• It checks if a target version branch contains vars.CURRENT_VERSION exists
  • if not - it creates it
• it checks this target branch is the default branch
  • if not - it makes it as the default branch

How to verify?

• I used act to test it locally partially.
• To test it in a real GH environment it should be merged. I will create a repo-level CURRENT_VERSION and will set it to 54 value. After the workflow is triggered and the new release-x.54.x branch is created I will remove it and set the proper release-x.53.x default branch

[heypoom]

All the shell commands look good to me 👍🏻