Use underscore

bin/module/php-fpm/add.inc

@@ -72,7 +72,7 @@ hestia_module_php-fpm_add() {
 
     # Install backend template
     cp -f $HESTIA_INSTALL_DIR/php-fpm/multiphp.tpl \
-        $HESTIA/data/templates/web/php-fpm/PHP-${php_withoutdot}.tpl
+        $HESTIA/data/templates/web/php-fpm/PHP-${php_version/\./_}.tpl
 
     osal_kv_write $HESTIA_CONF_MODULES/php.conf "php${php_withoutdot}_fpm" '1'