Update readme to version=2.2.1

Author: Github Action

README.md

@@ -25,7 +25,7 @@ new version to get future updates. See [migration guide](#migration-from-the-ori
 Contains the core and a BLE transport implementation using Nordic's [Android-BLE-Library v2](https://github.com/NordicSemiconductor/Android-BLE-Library).
 
 ```groovy
-implementation 'no.nordicsemi.android:mcumgr-ble:2.2.0'
+implementation 'no.nordicsemi.android:mcumgr-ble:2.2.1'
 ```
 
 The core module will be included automatically.
@@ -36,7 +36,7 @@ The core module will be included automatically.
 Core dependency only. Use if you want to provide your own transport implementation.
 
 ```groovy
-implementation 'no.nordicsemi.android:mcumgr-core:2.2.0'
+implementation 'no.nordicsemi.android:mcumgr-core:2.2.1'
 ```
 
 > Latest version targeting API 30 (Android 11) is 0.13.0-beta07.