Update ruby Docker tag to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ruby	image	major	2.5 → 4.0
ruby	image	major	2.4 → 4.0
ruby	image	major	2.3 → 4.0
ruby	image	major	2.2 → 4.0
ruby	image	major	2.1 → 4.0
ruby (source)	uses-with	major	2.7 → 4.0.0

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Release Notes

ruby/ruby (ruby)

v4.0.0: 4.0.0

See also:

• Release 3.5.0-preview1 · ruby/ruby
• Release 4.0.0-preview2 · ruby/ruby
• Release 4.0.0-preview3 · ruby/ruby

What's Changed

• Bump RDoc to 7.0.1 by st0012 · Pull Request #​15628
• make rb_singleton_class ractor safe by luke-gruber · Pull Request #​15591
• Remove assertion in encoded_iseq_trace_instrument by luke-gruber · Pull Request #​15616
• Bug #​21793: function name conflict of "mutex_trylock" on Solaris - Ruby - Ruby Issue Tracking System
• [DOC] small improvements to ractor class docs by luke-gruber · Pull Request #​15584
• Check for NULL fields in TYPEDDATA memsize functions by luke-gruber · Pull Request #​15633
• Feature #​21785: Add signed and unsigned LEB128 support to pack / unpack - Ruby - Ruby Issue Tracking System
• Fix rbs test failure caused by minitest6 by soutaro · Pull Request #​15643
• Fix: Do not check open_timeout twice by shioimm · Pull Request #​15626
• Fix: Specifying 0 should cause an immediate timeout by shioimm · Pull Request #​15641
• Bug #​21794: O_CLOEXEC is not available on Solaris 10 - Ruby - Ruby Issue Tracking System
• Fiber scheduler: invoke #io_write hook on IO flush by noteflakes · Pull Request #​15609
• Update NEWS.md for Fiber Scheduler by noteflakes · Pull Request #​15629
• Small documentation adjustments for new/updated features by zverok · Pull Request #​15634
• Add clarifications about the Enumerator.size by zverok · Pull Request #​15615
• Bug #​21792: 4.0.0-preview3: Build fails with --with-ext= when ENABLE_SHARED=yes: ruby/digest.h not found for rubyspec CAPI extensions - Ruby - Ruby Issue Tracking System
• [DOC] Enhancements for globals.md by BurdetteLamar · Pull Request #​15545
• Small improvements to doc/language/ractor.md by luke-gruber · Pull Request #​15588
• More doc improvements to ractor.md by luke-gruber · Pull Request #​15676
• Bump RDoc to 7.0.2 by st0012 · Pull Request #​15691
• [DOC] Improve ractor class docs (grammar, code examples) by luke-gruber · Pull Request #​15686
• [DOC] Languages in Examples by BurdetteLamar · Pull Request #​15697
• Bundle RBS 3.10.0 by soutaro · Pull Request #​15701
• Describe base code layout rules by zverok · Pull Request #​15696
• [DOC] Enhance Fiber::Scheduler docs by zverok · Pull Request #​15708
• [DOC] Cross-links between Japanese and English pages by BurdetteLamar · Pull Request #​15705
• ZJIT: Don't mark control-flow opcodes as invalidating locals by tekknolagi · Pull Request #​15694
• [DOC] Add back Rust 1.85.0 requirement to NEWS.md by chancancode · Pull Request #​15728

Note: This list is automatically generated by tool/gen-github-release.rb. Because of this, some commits may be missing.

Full Changelog

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