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

[Debian testing autoremoval watch]

ruby-aubio 0.3.6-2 is marked for autoremoval from testing on 2021-10-01

It (build-)depends on packages with these RC bugs:
971319: aubio: uses deprecated libavresample
 https://bugs.debian.org/971319



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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