Add releases section to README

[michael-valdron]

Please specify the area for this PR

documentation

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

Adds information about the releases and release cycle of the registry operator based on the complete release documentation under the release process document.

Which issue(s) this PR fixes:

Fixes #?

fixes devfile/api#1194

PR acceptance criteria:

• Test Coverage
  • Are your changes sufficiently tested, and are any applicable test cases added or updated to cover your changes?
• Gosec scans
  • Fix all MEDIUM and higher findings and/or annotate a finding per gosec instructions: https://github.com/securego/gosec#annotating-code to address why a finding is not a security issue

Documentation

• Does the registry operator documentation need to be updated with your changes?

How to test changes / Special notes to the reviewer:

[michael-valdron]

• Test Coverage
  • Are your changes sufficiently tested, and are any applicable test cases added or updated to cover your changes?
• Gosec scans
  • Fix all MEDIUM and higher findings and/or annotate a finding per gosec instructions: https://github.com/securego/gosec#annotating-code to address why a finding is not a security issue

N/A

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (deec778) 25.86% compared to head (df71ab2) 25.86%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #70   +/-   ##
=======================================
  Coverage   25.86%   25.86%           
=======================================
  Files          25       25           
  Lines        1415     1415           
=======================================
  Hits          366      366           
  Misses       1026     1026           
  Partials       23       23           

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[Jdubrick]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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

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