Update SUMMARY.md

ty4z2008 · ty4z2008 · commit 4a948c1fb367 · 2015-08-05T13:20:30.000+08:00
diff --git a/SUMMARY.md b/SUMMARY.md
@@ -1,6 +1,6 @@
 # Summary
 
-* [Introduction](README)
+* [Introduction](README.md)
 * [入门](zh-cn/0x0.md)
 * [入门 Pt.2](zh-cn/0x02.md)
 * [端口扫描](zh-cn/0x1.md)
