Fix minor capitalization error in string (#26100)

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Giteabot <teabot@gitea.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

Author: 4 people

options/locale/locale_en-US.ini

@@ -639,7 +639,7 @@ update_language_not_found = Language "%s" is not available.
 update_language_success = Language has been updated.
 update_profile_success = Your profile has been updated.
 change_username = Your username has been changed.
-change_username_prompt = Note: username changes also change your account URL.
+change_username_prompt = Note: Changing your username also changes your account URL.
 change_username_redirect_prompt = The old username will redirect until someone claims it.
 continue = Continue
 cancel = Cancel