[tbb-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
-------------------------------------------------+-------------------------
 Reporter:  cohosh                               |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  snowflake, TorBrowserTeam202004R,    |  Actual Points:
  tbb-9.5a12                                     |
Parent ID:                                       |         Points:
 Reviewer:  boklm                                |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by cohosh):

 * status:  reopened => needs_review


Comment:

 Just did a nightly build of the snowflake project for linux and it worked:

 https://gitweb.torproject.org/user/cohosh/tor-browser-
 build.git/commit/?h=ticket/33576&id=be5efccdf6aeb316a2b8c9888a942e647c544bc9

 I figured out what likely went wrong: I probably had the right git_url the
 first time I built it as an alpha testbuild. And then re-ran gomodtorbm
 which gave me the incorrect url, but the alpha testbuild didn't notice
 because the git hash didn't change. That's my current theory and I've
 switched to nightly testbuilds so this doesn't happen again, hopefully :)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33576#comment:16>
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