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

[Debian testing autoremoval watch]

ruby-mixlib-install 3.11.7-1.1 is marked for autoremoval from testing on 2021-11-13

It is affected by these RC bugs:
996321: ruby-mixlib-install: FTBFS with ruby3.0: ERROR: Test "ruby3.0" failed:   cannot load such file -- webrick
 https://bugs.debian.org/996321

It (build-)depends on packages with these RC bugs:
995346: ruby-chef-utils: depends on the Internet during build
 https://bugs.debian.org/995346



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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