Revert "Bump Go version to 1.23.6 (#30242)" (#30359)

This reverts commit acbbd4c58d.

server/channels/app/authentication.go

@@ -284,8 +284,8 @@ func (a *App) MFARequired(rctx request.CTX) *model.AppError {
 	return nil
 }
 
-func checkUserLoginAttempts(user *model.User, maxAttempts int) *model.AppError {
-	if user.FailedAttempts >= maxAttempts {
+func checkUserLoginAttempts(user *model.User, max int) *model.AppError {
+	if user.FailedAttempts >= max {
 		return model.NewAppError("checkUserLoginAttempts", "api.user.check_user_login_attempts.too_many.app_error", nil, "user_id="+user.Id, http.StatusUnauthorized)
 	}