fix: Update CODEOWNERS

[shahar4]

What ❔

This PR removed core from being requested to review every PR in the repo.

Why ❔

Code owners is still WIP, but this state is not sensible.

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via zk fmt and zk lint.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (d8ab843) 31.58% compared to head (ef31fad) 31.57%.

❗ Current head ef31fad differs from pull request most recent head 0fe2698. Consider uploading reports for the commit 0fe2698 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #118      +/-   ##
==========================================
- Coverage   31.58%   31.57%   -0.01%     
==========================================
  Files         477      477              
  Lines       25431    25431              
==========================================
- Hits         8033     8031       -2     
- Misses      17398    17400       +2     

see 1 file with indirect coverage changes

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[Deniallugo]

And who can approve PRs?