Change `Regenerate Secret` button display (#25534) (#25541)

Backport #25534 by @KN4CK3R

Fixes #25527

Preview:

![grafik](https://github.com/go-gitea/gitea/assets/1666336/a84ad1ba-43e6-42e5-a0e2-585fb226875d)

Co-authored-by: KN4CK3R <admin@oldschoolhack.me>

templates/user/settings/applications_oauth2_edit_form.tmpl

@@ -26,7 +26,7 @@
 		<form class="ui form ignore-dirty" action="{{.FormActionPath}}/regenerate_secret" method="post">
 			{{.CsrfTokenHtml}}
 			{{.locale.Tr "settings.oauth2_regenerate_secret_hint"}}
-			<button class="btn interact-bg" type="submit">{{.locale.Tr "settings.oauth2_regenerate_secret"}}</button>
+			<button class="ui mini button gt-ml-3" type="submit">{{.locale.Tr "settings.oauth2_regenerate_secret"}}</button>
 		</form>
 	</div>
 </div>