doc: baremodule: more accurate include example

In the example code:
* show the two-argument method, too
* show the dispatch constraint on the path argument of `include`, xref
  JuliaLang#55466

Author: nsajko

base/docs/basedocs.jl

@@ -187,7 +187,8 @@ baremodule Mod
 using Base
 
 eval(x) = Core.eval(Mod, x)
-include(p) = Base.include(Mod, p)
+include(p::AbstractString) = Base.include(Mod, p)
+include(f::Function, p::AbstractString) = Base.include(f, Mod, p)
 
 ...