update version to 0.24.8-rc.2

CHANGELOG

@@ -2,6 +2,16 @@ development
 ===========
 - ...
 
+0.24.8-rc.2
+======
+- Fixes a local privilege escalation security bug when using "--install-helpers"
+- Change bitmask branded app name to Bitmask from BitmaskVPN
+- Fixes bug where MOTD message box was not shown for RiseupVPN
+- Show bridge icon when KCP transport is selected
+- Show license page during installation
+- Uninstalls previous version before installing current version
+- Adds accessibility hints to connection button
+
 0.24.8-rc.1
 ======
 - Exposes KCP support in the UI