[tbb-bugs] #28436 [Applications/Tor Browser]: Update link to gn cross_compile.md

[Tor Bug Tracker & Wiki]

#28436: Update link to gn cross_compile.md
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     Reporter:  dcf                       |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  tbb-rbm
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 Was looking at this area of the code today and noticed that this link in a
 comment had changed.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28436>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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