Update devfile registry maintainers list under helm chart

[michael-valdron]

Please specify the area for this PR

helm chart

What does does this PR do / why we need it:

Updates devfile registry maintainers listed under helm chart manifest.

Which issue(s) this PR fixes:

Fixes #?

fixes devfile/api#1436

related to devfile/registry-operator#78

PR acceptance criteria:

• Test Coverage
  • Are your changes sufficiently tested, and are any applicable test cases added or updated to cover your changes?

Documentation (WIP)

• Does the REST API doc need to be updated with your changes?
• Does the registry library doc need to be updated with your changes?

How to test changes / Special notes to the reviewer:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.23%. Comparing base (5df13d4) to head (cff365f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #201   +/-   ##
=======================================
  Coverage   27.23%   27.23%           
=======================================
  Files           7        7           
  Lines        2012     2012           
=======================================
  Hits          548      548           
  Misses       1417     1417           
  Partials       47       47           

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[thepetk]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: michael-valdron, thepetk

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