fix(demo-tempalte-beetl/README.md): 修复文件后缀名错误

zhangyitian · zhangyitian · commit 7c980c593d02 · 2022-10-17T15:22:54.000+08:00
Closes #237
diff --git a/demo-template-beetl/README.md b/demo-template-beetl/README.md
@@ -138,7 +138,7 @@ public class UserController {
 }
 ```
 
-## index.html
+## index.btl
 
 ```jsp
 <!doctype html>
@@ -152,7 +152,7 @@ public class UserController {
 </html>
 ```
 
-## login.html
+## login.btl
 
 ```jsp
 <!doctype html>
