[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 2021-12-06

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
997310: ruby-pygments.rb: FTBFS: ERROR: Test "ruby2.7" failed.
 https://bugs.debian.org/997310
998483: ruby-adsf: FTBFS: ERROR: Test "ruby3.0" failed: LoadError: Couldn't find handler for: puma, thin, falcon, webrick.
 https://bugs.debian.org/998483



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