Mention help?> "string" in the docstring for apropos

[Seelengrab]

The docstring for apropos could mention the shorthand help?> "string" version as well, I use apropos all the time but just learned about this shorthand <3

Originally posted by @baggepinnen in #37523 (comment)

This would be a good first doc issue - the definition for apropos and its docstring can be found here:

julia/stdlib/REPL/src/docview.jl

Lines 797 to 805 in 17e0bba

	"""
	apropos([io::IO=stdout], pattern::Union{AbstractString,Regex})
	Search available docstrings for entries containing `pattern`.
	When `pattern` is a string, case is ignored. Results are printed to `io`.
	"""
	apropos(string) = apropos(stdout, string)
	apropos(io::IO, string) = apropos(io, Regex("\\Q$string", "i"))