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 2 slowest examples (0.11 seconds, 100% of total time)

Example	Description	Time in seconds
spec/unit/resources/config_spec.rb:21	resolver_config create a resolv config and verify config is created properly Creates the main configuration file	0.07176
spec/unit/resources/systemd_resolved_config_spec.rb:16	resolver_systemd_resolved_config create a resolv config and verify config is created properly Creates the main configuration file	0.04078