Update graph.md

Author: muxiaoxiong

docs/01-algorithm-basics/data-structures/graph.md

@@ -12,7 +12,7 @@
 
 + 邻接表表示的无向图
 
-<img src="/image/g-2.png">
+<img src="/images/g-2.png">
 
 
 ## 1. 最短路径
@@ -332,4 +332,4 @@ bool isCyclicGraph(vector<int> &start, vector<int> &end) {
 # 参考
 1. https://www.cnblogs.com/Ash-ly/p/5920953.html
 2. https://www.geeksforgeeks.org/graph-data-structure-and-algorithms/
-3. 
+3.