add changelogs

changelogs/unreleased/feature-set-public-email-through-api.yml

+---
+title: Add support for setting the public email through the api
+merge_request: 21938
+author: Alexis Reigel
+type: added

changelogs/unreleased/fix-add-organization-and-location-to-allowed-parameters.yml

+---
+title: Allow setting user's organization and location attributes through the API by adding them to the list of allowed parameters
+merge_request: 21938
+author: Alexis Reigel
+type: fixed