Rubydoc minimum version conflicts with actual minimum version

[Jefferson Hudson]

Rubydoc states that the minimum required ruby version is 2.4.0, but attempting to install on v2.4.6 results in the following error:

$ gem install ruby-prof
Fetching: ruby-prof-1.4.3.gem (100%)
ERROR:  Error installing ruby-prof:
	ruby-prof requires Ruby version >= 2.5.0.

[Jefferson Hudson]

$ rbenv version
2.4.6

[Jefferson Hudson]

[Charlie Savage]

Thanks - fixed.