Update OWNERS to add 'grokspawn' as LGTMer.

[grokspawn]

Description of the change:
Set me up to shoulder some of the blame for code I write. ;)

Motivation for the change:

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

[codecov]

Codecov Report

Merging #955 (50ad1b0) into master (fd85a98) will not change coverage.
The diff coverage is n/a.

❗ Current head 50ad1b0 differs from pull request most recent head af0b0c6. Consider uploading reports for the commit af0b0c6 to get more accurate results

@@           Coverage Diff           @@
##           master     #955   +/-   ##
=======================================
  Coverage   52.42%   52.42%           
=======================================
  Files         103      103           
  Lines        9228     9228           
=======================================
  Hits         4838     4838           
  Misses       3468     3468           
  Partials      922      922           

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[timflannagan]

/lgtm

[timflannagan]

/lgtm

[dinhxuanvu]

/lgtm

[dinhxuanvu]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dinhxuanvu, grokspawn

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• OWNERS [dinhxuanvu]

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