[DRE-maint] nanoc is marked for autoremoval from testing

[Debian testing autoremoval watch]

nanoc 4.11.23-2 is marked for autoremoval from testing on 2021-11-27

It (build-)depends on packages with these RC bugs:
996238: ruby-hamster: FTBFS with ruby3.0: ERROR: Test "ruby3.0" failed: RuntimeError:
 https://bugs.debian.org/996238
996523: ruby-websocket: FTBFS with ruby3.0: ERROR: Test "ruby3.0" failed:   cannot load such file -- webrick
 https://bugs.debian.org/996523



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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