Add a list of contributors and their contributions to the release page

[savitharaghunathan]

To recognize contributors, lets add a section to the release page mentioning their name and PRs. For example - https://github.com/openshift/oadp-operator/releases/tag/v1.1.0

@djzager @jmontleon is this something that can be added to the automation?

cc: @pranavgaikwad @jwmatthews

[djzager]

@kaovilai you may have mentioned previously, but how are the new contributors retrieved?

[kaovilai]

It's automatic from the GitHub auto generate release notes

[kaovilai]

[kaovilai]

If you wanna automate this I have an example workflows that retrieves this data from github rest api at https://github.com/kaovilai/oadp-release-notes

Please take a look there. Use it to generate this automated text then perhaps grep for ## New Contributors and collect usernames.