CI: build fail on jruby re: bake-modernize dep "rugged"

[olleolleolle]

A recent JRuby test run failed, due to some gems which needed a C ext (rugged?), perhaps?

https://github.com/socketry/async-io/runs/1861635440

*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/home/runner/.rubies/jruby-9.2.14.0/bin/jruby
	--with-sha1dc
	--without-sha1dc
	--use-system-libraries
	--with-git2-dir
	--without-git2-dir
	--with-git2-include
	--without-git2-include=${git2-dir}/include
	--with-git2-lib
	--without-git2-lib=${git2-dir}/lib
	--with-git2lib
	--without-git2lib

To see why this extension failed to compile, please check the mkmf.log which can
be found here:

/home/runner/.rubies/jruby-9.2.14.0/lib/ruby/gems/shared/extensions/universal-java-1.8/2.5.0/rugged-1.1.0/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in
/home/runner/.rubies/jruby-9.2.14.0/lib/ruby/gems/shared/gems/rugged-1.1.0 for
inspection.
Results logged to
/home/runner/.rubies/jruby-9.2.14.0/lib/ruby/gems/shared/extensions/universal-java-1.8/2.5.0/rugged-1.1.0/gem_make.out

An error occurred while installing rugged (1.1.0), and Bundler cannot continue.
Make sure that `gem install rugged -v '1.1.0' --source 'https://rubygems.org/'`
succeeds before bundling.

In gems.rb:
  bake-modernize was resolved to 0.4.5, which depends on
    rugged
Error: Process completed with exit code 5.

[ioquatix]

bake modernise should not be needed during tests, maybe a mistake.