ruby: ports do not give note on using port select

[LenoreHorner]

Python and other ports give a useful note at the end.

python38 has the following notes:
    To make this the default Python or Python 3 (i.e., the version run by the
    'python' or 'python3' commands), run one or both of:
    
        sudo port select --set python python38
        sudo port select --set python3 python38

However, ruby30 (the only one I've checked) does not give similar help. Why not? The same syntax works:

sudo port select --set ruby ruby30

.

port notes ruby30
--->  ruby30 has no notes.

[mascguy (Christopher Nielsen)]

It looks like none of our Ruby ports call this out via port notes, so we should plan to update all.

[kimura wataru <kimuraw@…>]

In cabc46e29d785de417b2cdc7f312b7e2ade787b9/macports-ports (master):

lang/ruby30, ruby27, .. ruby19, ruby: introduce notes about 'port select'

closes: #63602

$ sudo port install ruby30
--->  Computing dependencies for ruby30
   :
--->  Some of the ports you installed have notes:
  ruby30 has the following notes:
    To make this the default Ruby (i.e., the version run by the 'ruby', 'gem' or 'bundle' commands),
    run:
        sudo port select --set ruby ruby30
$

$ port notes ruby30
--->  ruby30 has the following notes:
  To make this the default Ruby (i.e., the version run by the 'ruby', 'gem' or 'bundle' commands),
  run:
      sudo port select --set ruby ruby30
$