Chore: add codeowner in release 1.8

[chivalryq]

Description of your changes

Fixes #

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• Run yarn lint to ensure the frontend changes are ready for review.
• Run make reviewableto ensure the server changes are ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

Special notes for your reviewer

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -27.54 ⚠️

Comparison is base (d3710a6) 61.27% compared to head (7e393f6) 33.74%.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.8     #822       +/-   ##
================================================
- Coverage        61.27%   33.74%   -27.54%     
================================================
  Files              109       89       -20     
  Lines            19126    17667     -1459     
================================================
- Hits             11719     5961     -5758     
- Misses            5967    10811     +4844     
+ Partials          1440      895      -545     

Flag	Coverage Δ
apiserver-unittests	33.74% <ø> (-0.03%)	⬇️
server-e2e-tests	?

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see 94 files with indirect coverage changes

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