[tor-bugs] #33576 [Applications/Tor Browser]: Update pion-webrtc version to 2.2.3

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#33576: Update pion-webrtc version to 2.2.3
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 Reporter:  cohosh                    |          Owner:  cohosh
     Type:  defect                    |         Status:  assigned
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  snowflake                 |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by cohosh):

 Here's a patch that updates it using the script method from #28942:
 https://gitweb.torproject.org/user/cohosh/tor-browser-
 build.git/commit/?h=bug/33576&id=282f699cd4079a8f6947876e1005b318a3349fb8

 I had to make a few modifications to the script to account for new patters
 in the output of `go mod graph`, I've attached the script to this ticket.
 I'm going to take a look and see if we can prune some of the dependencies.
 dcf pointed out in #33330 that some of the dependencies are only needed
 for tests.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33576#comment:1>
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