Update README.md

Author: benok

README.md

@@ -2,7 +2,7 @@ VersionLister
 =============
 A small tool to list up dll & exe with product version info.
 
-* Created to find openssl heartbleed bug dlls.
+* Created to find openssl [heartbleed bug](http://heartbleed.com/) dlls.
 * You can search files & highlight version with regexp.
 * Default pattern is set for hertbleed bug dlls.