[#1680] Update changelog

Signed-off-by: Leonard Lyubich <ctulhurider@gmail.com>

CHANGELOG.md

@@ -6,19 +6,20 @@ Changelog for NeoFS Node
 ### Added
 - Serving `NetmapService.NetmapSnapshot` RPC (#1793)
 - `netmap snapshot` command of NeoFS CLI (#1793)
-
+- Support `MAINTENANCE` state of the storage nodes (#1680, #1681)
 - Changelog updates CI step (#1808)
 - Validate storage node configuration before node startup (#1805)
 - `neofs-node -check` command to check the configuration file (#1805)
 - `flush-cache` control service command to flush write-cache (#1806)
 
 ### Changed
-
 - Allow to evacuate shard data with `EvacuateShard` control RPC (#1800)
 
 ### Fixed
 - Description of command `netmap nodeinfo` (#1821)
 - Proper status for object.Delete if session token is missing (#1697)
+- Storage nodes could enter the network with any state (#1796)
+- Missing check of new state value in `ControlService.SetNetmapStatus` (#1797)
 
 ### Removed
 - Remove WIF and NEP2 support in `neofs-cli`'s --wallet flag (#1128)