[MacPorts] #44451: Update Installer System Requirements info

[MacPorts]

#44451: Update Installer System Requirements info
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 Reporter:  enekogotzon@…           |      Owner:  macports-tickets@…
     Type:  enhancement             |     Status:  new
 Priority:  Low                     |  Milestone:
Component:  base                    |    Version:  2.3.1
 Keywords:  Installer, information  |       Port:
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 In the information about the installation of Xcode just add that it is
 also available at the Mac App Store.
 —I love you— :)

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Ticket URL: <https://trac.macports.org/ticket/44451>
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