Update _sidebar.md

Author: j2doll

docs/_sidebar.md

@@ -5,7 +5,7 @@
 
 ---
 
-* [test/README.md 한글 漢字](test/README.md)
-* [test/more.md 이모지 🙂](test/more.md)
+* [`test/README` 한글 漢字](test/README.md)
+* [`test/more` 이모지 🙂](test/more.md)