chore(deps): update actions/checkout action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v5 → v6

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Release Notes

actions/checkout (actions/checkout)

v6

Compare Source

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Configuration

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Slowest examples

Top 10 slowest examples (0.02 seconds, 73.13% of total time)

Example	Description	Time in seconds
spec/libraries/certificate_helpers_spec.rb:15	Java::Cookbook::CertificateHelpers#default_truststore_path Java 9 returns the correct path	0.01273
spec/libraries/corretto_helpers_spec.rb:79	Java::Cookbook::CorrettoHelpers#default_bin_cmds Corretto 11 returns the correct bin command array	0.00646
spec/libraries/corretto_helpers_spec.rb:20	Java::Cookbook::CorrettoHelpers#default_corretto_url Corretto 11 x64 returns the correct URL	0.00356
spec/libraries/corretto_helpers_spec.rb:29	Java::Cookbook::CorrettoHelpers#default_corretto_url Corretto 17 x64 returns the correct URL	0.00056
spec/libraries/openjdk_helpers_spec.rb:94	Java::Cookbook::OpenJdkHelpers#default_openjdk_install_method Debian 9 OpenJDK 17 should default to a source install	0.00047
spec/libraries/openjdk_helpers_spec.rb:126	Java::Cookbook::OpenJdkHelpers#default_openjdk_install_method Debian 11 OpenJDK 17 should default to a package install	0.00047
spec/libraries/openjdk_helpers_spec.rb:134	Java::Cookbook::OpenJdkHelpers#default_openjdk_install_method Debian 11 OpenJDK 11 should default to a package install	0.00045
spec/libraries/openjdk_helpers_spec.rb:146	Java::Cookbook::OpenJdkHelpers#default_openjdk_install_method Debian Ubuntu 18.04 OpenJDK 17 should default to a source install	0.00045
spec/libraries/openjdk_helpers_spec.rb:32	Java::Cookbook::OpenJdkHelpers#default_openjdk_url Invalid OpenJDK version should raise an error	0.00045
spec/libraries/openjdk_helpers_spec.rb:64	Java::Cookbook::OpenJdkHelpers#default_openjdk_install_method Amazon should default to a source install	0.00044