refactor: add @openedx in renovate automate configuration

[Mashal-m]

Description

Add @openedx in renovate automate configuration.

Ticket

Create common renovate config that automates @edx and @openedx namespaced minor/patch version upgrades

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[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (a82beec) 91.83% compared to head (59d33cf) 91.83%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2679   +/-   ##
=======================================
  Coverage   91.83%   91.83%           
=======================================
  Files         235      235           
  Lines        4224     4224           
  Branches     1024     1024           
=======================================
  Hits         3879     3879           
  Misses        341      341           
  Partials        4        4           

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[edx-semantic-release]

🎉 This PR is included in version 22.0.0-alpha.8 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

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[edx-semantic-release]

🎉 This PR is included in version 21.4.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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