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 (1.05 seconds, 26.87% of total time)

Example	Description	Time in seconds
spec/unit/resources/install_spec.rb:15	nginx_install with default properties with repo source with ubuntu platform is expected to create template "(?-mix:/ohai/plugins/nginx.rb)"	0.25962
spec/unit/resources/install_spec.rb:51	nginx_install with default properties with distro source with ubuntu platform is expected to install package "nginx-full"	0.22082
spec/unit/resources/site_spec.rb:32	nginx_site with template is expected to create template "/etc/nginx/conf.http.d/default.conf"	0.0922
spec/unit/resources/config_spec.rb:17	nginx_config with default properties is expected to create template "/etc/nginx/nginx.conf"	0.08239
spec/unit/resources/install_spec.rb:21	nginx_install with default properties with repo source with opensuse platform is expected to install package "nginx"	0.07497
spec/unit/resources/install_spec.rb:72	nginx_install with default properties with repo source with debian platform is expected to add apt_repository "nginx"	0.06713
spec/unit/resources/config_spec.rb:52	nginx_config with default properties is expected to create directory "/etc/nginx/conf.http.d"	0.06648
spec/unit/resources/install_spec.rb:14	nginx_install with default properties with epel source with centos-stream 9 platform is expected to do nothing	0.06637
spec/unit/resources/install_spec.rb:35	nginx_install with default properties with distro source with debian platform is expected to install package "nginx-full"	0.06155
spec/unit/resources/install_spec.rb:14	nginx_install with default properties with repo source with centos platform is expected to do nothing	0.06154