Migration guide for SDK v5.0.0 (#589)

* Release notes/migration guide for SDK v5.0

* Release notes/migration guide for SDK v5.0

* Migrating to 4.1.x

* correct version

* version updated

* Domain API method added

* some updates

* param name fixed

* all new interfaces and enums are listed now

* small fixes

* fix typo

* Changes from openAPI spec v2.6.0 has been added

Co-authored-by: Arvind Krishnakumar <61501885+arvindkrishnakumar-okta@users.noreply.github.com>