[DRE-maint] ruby-async-http is marked for autoremoval from testing

[Debian testing autoremoval watch]

ruby-async-http 0.52.5-1 is marked for autoremoval from testing on 2021-10-29

It is affected by these RC bugs:
995354: ruby-async-http: autopkgtest needs update for new version of ruby-protocol-http: Could not find 'protocol-http' (~> 0.20.0)
 https://bugs.debian.org/995354



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https://salsa.debian.org/release-team/release-tools/-/blob/master/mailer/mail_autoremovals.pl

Autoremoval data is generated by:
https://salsa.debian.org/qa/udd/-/blob/master/udd/testing_autoremovals_gatherer.pl