chore: apply some missed code review nits from 29256 (#29289)

Addresses follow-ups from #29256

cli/exp_update_user_email.go

@@ -51,7 +51,7 @@ func (r *RootCmd) updateUserEmail() *serpent.Command {
 			_, _ = fmt.Fprintf(inv.Stdout,
 				"This will update the email address for the account currently using %q to %q.\n"+
 					"All Coder sessions and API tokens for that user will be revoked.\n"+
-					"If the user logs in with an external identity provider, it may overwrite the email when the user next signs in.\n",
+					"If the user logs in with an external identity provider, it may overwrite the new email when the user next signs in.\n",
 				oldEmail, newEmail,
 			)
 

coderd/users.go

@@ -976,7 +976,7 @@ func (api *API) putUserEmailExperimental(rw http.ResponseWriter, r *http.Request
 			UpdatedAt: dbtime.Now(),
 		})
 		if err != nil {
-			return err
+			return xerrors.Errorf("update user email: %w", err)
 		}
 
 		//nolint:gocritic // This break-glass operation must revoke all API keys