Update 785.is-graph-bipartite.md

Author: azl397985856

problems/785.is-graph-bipartite.md

@@ -137,6 +137,10 @@ class Solution:
 
 ### 代码
 
+代码支持：Python3，Java
+
+Python3 Code：
+
 ```py
 class UF:
     def __init__(self, n):
@@ -163,6 +167,8 @@ class Solution:
         return True
 ```
 
+Java Code：
+
 ```java
 // weighted quick-union with path compression
 class Solution {