[ews-app] Rename Patch model in ews django app database to change.
Pull request: https://github.com/WebKit/WebKit/pull/2366
Committed 252415@main (0b9384196dff): <https://commits.webkit.org/252415@main> Reviewed commits have been landed. Closing PR #2366 and removing active labels.
<rdar://problem/96957210>