fix bug

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/engine/EnjoyTemplateEngine.java

@@ -46,7 +46,7 @@ public class EnjoyTemplateEngine extends AbstractTemplateEngine {
 
     @Override
     public String writer(@NotNull Map<String, Object> objectMap, @NotNull String templateName, @NotNull String templateString) throws Exception {
-        Template template = engine.getTemplate(templateString);
+        Template template = engine.getTemplateByString(templateString);
         return template.renderToString(objectMap);
     }