update readme.md

Author: xtaci

README.md

@@ -55,7 +55,7 @@
     Red-black tree
     Interval tree
     Prefix Tree(Trie)
-    *Suffix Tree(未实现)*
+    Suffix Tree
     B-Tree
 
     Hash by multiplication
@@ -96,4 +96,4 @@
     wycg1984: for K-Means
     xmuliang: for HeapSort, Kruskal MST
     wyh267: for base64, LRU, bubble sort, selection sort
-    ZhangYou0122 : Push-Relabel algorithm
+    ZhangYou0122 : Push-Relabel algorithm, SuffixTree