chore(deps): update dependency bundler to v4.0.19

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
bundler (source, changelog)	4.0.17 → 4.0.19

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Release Notes

ruby/rubygems (bundler)

v4.0.19

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Enhancements:

• Reject SafeMarshal collection lengths longer than the remaining input. Pull request #​9756 by hsbt
• Installs bundler 4.0.19 as a default gem.

Bug fixes:

• Fix gem uninstall --user-install crash when GEM_HOME does not exist. Pull request #​9749 by hsbt

Documentation:

• Document SPDX license handling for license= and licenses=. Pull request #​9766 by hsbt

v4.0.18

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Enhancements:

• Check the resolved parent directory before extracting old format gems. Pull request #​9755 by hsbt
• Installs bundler 4.0.18 as a default gem.

Bug fixes:

• Call Kernel.format explicitly in Gem::Deprecate wrapper. Pull request #​9714 by hsbt

Documentation:

• Point bundler.io URLs at guides.rubygems.org. Pull request #​9737 by hsbt

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