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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Slowest examples

Top 10 slowest examples (0.01 seconds, 51.5% of total time)

Example	Description	Time in seconds
spec/libraries/helpers_spec.rb:19	PostgreSQL::Cookbook::Helpers#data_dir(version) with rhel family and Postgres 11 from repo returns the correct path	0.01278
spec/libraries/helpers_spec.rb:132	PostgreSQL::Cookbook::Helpers#dnf_module_platform? returns false on RHEL 7	0.00315
spec/libraries/helpers_spec.rb:27	PostgreSQL::Cookbook::Helpers#data_dir(version) with rhel family and Postgres 11 from os returns the correct path	0.00047
spec/libraries/helpers_spec.rb:35	PostgreSQL::Cookbook::Helpers#data_dir(version) with debian family and Postgres 12 from repo returns the correct path	0.0004
spec/libraries/helpers_spec.rb:111	PostgreSQL::Cookbook::Helpers#default_platform_service_name(version) with debian family and Postgres 11 from repo returns the correct service name	0.0004
spec/libraries/helpers_spec.rb:35	PostgreSQL::Cookbook::Helpers#data_dir(version) with debian family and Postgres 11 from repo returns the correct path	0.0004
spec/libraries/helpers_spec.rb:65	PostgreSQL::Cookbook::Helpers#conf_dir(version) with rhel family and Postgres 14 from os returns the correct path	0.0004
spec/libraries/helpers_spec.rb:144	PostgreSQL::Cookbook::Helpers#dnf_module_platform? returns true on RHEL 9	0.0004
spec/libraries/helpers_spec.rb:65	PostgreSQL::Cookbook::Helpers#conf_dir(version) with rhel family and Postgres 12 from os returns the correct path	0.00039
spec/libraries/helpers_spec.rb:43	PostgreSQL::Cookbook::Helpers#data_dir(version) with debian family and Postgres 11 from os returns the correct path	0.00039