Update Changelog.md

Author: GregorBiswanger

Changelog.md

@@ -1,4 +1,17 @@
-# not release
+# Not released
+
+# 5.22.13
+
+ElectronNET.CLI:
+
+ElectronNET.API:
+
+* Fixed bug: Menu Item visibility [\#257](https://github.com/ElectronNET/Electron.NET/issues/257)
+* Fixed bug: electron.manifest.json - singleInstance not working [/#258](https://github.com/ElectronNET/Electron.NET/issues/258)
+
+ElectronNET.WebApp:
+
+# Released
 
 # 5.22.12