update release notes

RELEASE-NOTES.md

@@ -56,6 +56,7 @@
 1. [ISSUE #1015](https://github.com/sharding-sphere/sharding-sphere/issues/1015) Support SQL like `SELECT id, COUNT(*) FROM table GROUP BY 1,2`
 1. [ISSUE #1120](https://github.com/sharding-sphere/sharding-sphere/issues/1120) Derived columns of `GROUP BY / ORDER BY` appear in query result
 1. [ISSUE #1186](https://github.com/sharding-sphere/sharding-sphere/issues/1186) Dead lock may occur on MEMORY_STRICTLY mode when get connection on concurrency environment
+1. [ISSUE #1265](https://github.com/sharding-sphere/sharding-sphere/issues/1265) RoundRobinMasterSlaveLoadBalanceAlgorithm throw an ArrayIndexOutOfBoundsException when AtomicInteger overflow
 
 #### Sharding-JDBC
 

RELEASE-NOTES_ZH.md

@@ -58,6 +58,7 @@
 1. [ISSUE #1015](https://github.com/sharding-sphere/sharding-sphere/issues/1015) 支持SQL `SELECT id, COUNT(*) FROM table GROUP BY 1,2`
 1. [ISSUE #1120](https://github.com/sharding-sphere/sharding-sphere/issues/1120) `GROUP BY / ORDER BY`产生的补列不应展现在查询结果中
 1. [ISSUE #1186](https://github.com/sharding-sphere/sharding-sphere/issues/1186) 在MEMORY_STRICTLY模式中，并发环境下可能产生死锁
+1. [ISSUE #1265](https://github.com/sharding-sphere/sharding-sphere/issues/1265) 当AtomicInteger溢出后，RoundRobinMasterSlaveLoadBalanceAlgorithm抛出ArrayIndexOutOfBoundsException异常
 
 #### Sharding-JDBC