Add changelog for 3.24.1

Signed-off-by: Álvaro Brey <alvaro.brey@nextcloud.com>

CHANGELOG.md

@@ -1,3 +1,9 @@
+## 3.24.1 (February 21, 2022)
+
+- Fix crash in previous version when connecting to old server versions
+
+Minimum: NC 16 Server, Android 6.0 Marshmallow
+
 ## 3.24.0 (February 13, 2022)
 
 - Several performance optimizations by @starypatyk