fix: jsonschema to correctly validate key|keys in rollout segment

[halcyonCorsair]

Correctly validate both cases for rollout segment in the JSON schema:

    rollouts:
      - segment:
          key: Single-Constraint
          value: false
      - segment:
          keys:
            - Single-Constraint
            - Any-Constraint-Segment
          value: false

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.25%. Comparing base (f997fb9) to head (1b95c16).
Report is 207 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2947      +/-   ##
==========================================
+ Coverage   70.78%   72.25%   +1.46%     
==========================================
  Files          91       91              
  Lines        8729     7064    -1665     
==========================================
- Hits         6179     5104    -1075     
+ Misses       2165     1579     -586     
+ Partials      385      381       -4     

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[GeorgeMac]

Nice one 🙏

[markphelps]

@all-contributors please add @halcyonCorsair for code

[allcontributors]

@markphelps

I've put up a pull request to add @halcyonCorsair! 🎉