update demo link

imsun · imsun · commit 02d9165f6007 · 2017-01-14T00:44:35.000+08:00
diff --git a/README.md b/README.md
@@ -3,4 +3,4 @@ CSS-Minesweeper
 
 An ugly Minesweeper in pure HTML &amp; CSS3 without JS.
 
-[Demo](http://www.imsun.net/project/CSS-Minesweeper)
+[Demo](https://imsun.net/project/CSS-Minesweeper)

Original file line number	Diff line number	Diff line change
`@@ -3,4 +3,4 @@ CSS-Minesweeper`
`3`	`3`
`4`	`4`	`An ugly Minesweeper in pure HTML & CSS3 without JS.`
`5`	`5`
`6`		`-[Demo](http://www.imsun.net/project/CSS-Minesweeper)`
	`6`	`+[Demo](https://imsun.net/project/CSS-Minesweeper)`