[Fedora Infrastructure] #1931: update link to infrastructure mailinglist archive on 503 error page

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#1931: update link to infrastructure mailinglist archive on 503 error page
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 Reporter:  till         |       Owner:  webmaster
     Type:  enhancement  |      Status:  new      
 Priority:  trivial      |   Milestone:           
Component:  Web Content  |     Version:           
 Severity:  Normal       |    Keywords:           
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 = problem =
 The 504 error page currently visible at for the Fedora Community Portal
 contains a link to the old fedora infrastructure mailing list archive.
 Old link:
 https://www.redhat.com/archives/fedora-infrastructure-list/
 New location:
 http://lists.fedoraproject.org/pipermail/infrastructure/

The 503 error comes here:
 https://admin.fedoraproject.org/community