Update changes log for release.

CHANGES

@@ -1,5 +1,19 @@
 HikariCP Changes
 
+Changes in 2.6.2
+
+ * issue 890 add support for Prometheus metrics and multiple HikariCP pools.
+
+ * issue 880 fix race condition caused by sorting collection while the condition of
+   sort can change.
+
+ * issue 876 add support for using a Prometheus CollectorRegistry other than the
+   default one.
+
+ * issue 867 support network timeout even for Connection.isValid().
+
+ * issue 866 mark commit state dirty when Connection.getMetaData() is called.
+
 Changes in 2.6.1
 
  * issue 821 if a disconnection class exception is thrown during initial connection
@@ -11,14 +25,14 @@ Changes in 2.6.1
  * issue 817 updated behavior of new initializationFailTimeout, please see the
    official documentation for details.
 
- * issue 742 add direct MXBean accessor methods to HikariDataSource for users who do 
+ * issue 742 add direct MXBean accessor methods to HikariDataSource for users who do
    not want run run JMX.
 
 Changes in 2.6.0
 
  * Redesign of the contention code path resulting in doubling contended throughput; now
    contended pool access retains 98% of the uncontended throughput.
- 
+
  * issue 793 add new HikariConfig method, setScheduledExecutor(ScheduledExecutorService),
    and deprecate method setScheduledExecutorService(ScheduledThreadPoolExecutor). It is
    unfortunate that the deprecated method has the more accurate name, but its signature