[devtools week] Update OWNERS file & update release section

[thepetk]

What does this PR do?:

• Includes all team inside OWNERS file
• Updates the release section inside README.md with a list of steps to create a new release. It also mentions explicitly that releases are created on demand.

Which issue(s) this PR fixes:

task of devtools week sep 2023

PR acceptance criteria:

Testing and documentation do not need to be complete in order for this PR to be approved. We just need to ensure tracking issues are opened.

• Open new test/doc issues under the devfile/api repo
• Check each criteria if:
• There is a separate tracking issue. Add the issue link under the criteria
  or
• test/doc updates are made as part of this PR
• If unchecked, explain why it's not needed

• Unit/Functional tests

• QE Integration test

• Documentation

• Client Impact

• Gosec scans

How to test changes / Special notes to the reviewer:

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (99a3776) 60.84% compared to head (c1855f0) 60.84%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #181   +/-   ##
=======================================
  Coverage   60.84%   60.84%           
=======================================
  Files          41       41           
  Lines        5006     5006           
=======================================
  Hits         3046     3046           
  Misses       1767     1767           
  Partials      193      193           

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: maysunfaisal, thepetk

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Needs approval from an approver in each of these files:

• OWNERS [maysunfaisal]

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