Update CHANGELOG.md

Author: jtopjian

CHANGELOG.md

@@ -15,7 +15,9 @@ IMPROVEMENTS
 * Added `identity/v3/roles.User.Name` [GH-2133](https://github.com/gophercloud/gophercloud/pull/2133)
 * Added `identity/v3/roles.Group.Name` [GH-2133](https://github.com/gophercloud/gophercloud/pull/2133)
 * Added `blockstorage/extensions/availabilityzones.List` [GH-2135](https://github.com/gophercloud/gophercloud/pull/2135)
-
+* Added `blockstorage/v3/volumetypes.ListAccesses` [GH-2138](https://github.com/gophercloud/gophercloud/pull/2138)
+* Added `blockstorage/v3/volumetypes.AddAccess` [GH-2138](https://github.com/gophercloud/gophercloud/pull/2138)
+* Added `blockstorage/v3/volumetypes.RemoveAccess` [GH-2138](https://github.com/gophercloud/gophercloud/pull/2138)
 
 ## 0.16.0 (February 23, 2021)