(maint) Revert manual bump of version number

This will be completed by AddinDisco, once it is known that all
addins support the correct version of Cake.

Author: gep13

Source/Cake.Recipe/cake-version.yml

@@ -1,2 +1,3 @@
-TargetCakeVersion: 3.0.0
+TargetCakeVersion: 2.0.0
 TargetFrameworks: []
+