docs(README): Indicate that plugins are for Capacitor 5 (#1582)

README.md

@@ -2,11 +2,12 @@
 
 This repository contains the official Capacitor plugins maintained by the Capacitor team. You can find more plugins in the [Capacitor Community](https://github.com/capacitor-community/).
 
-> ### :rotating_light: These plugins are for Capacitor 4 :rotating_light:
+> ### :rotating_light: These plugins are for Capacitor 5 :rotating_light:
 >
 > Capacitor 2 core plugins are bundled with Capacitor itself.
 >
 > For Capacitor 3, use the 1.x version of the plugins.
+> For Capacitor 4, use the 4.x version of the plugins.
 
 ## Plugins