Update README.md

Author: selmo-lyz

README.md

@@ -1,4 +1,4 @@
 # LabIntroPage
 
-This is just practicing. Please be mindful if you want to use.
+This is just practicing. Please be mindful if you want to use.  
 該網頁僅僅是練習用，請斟酌使用。