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

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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

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Slowest examples

Top 10 slowest examples (1.61 seconds, 54.16% of total time)

Example	Description	Time in seconds
spec/unit/recipes/install_spec.rb:58	haproxy_install compile HAProxy on AlmaLinux 10 (uses PCRE2) is expected to install package "["pcre2-devel", "openssl-devel", "zlib-devel", "systemd-devel", "tar"]"	0.40986
spec/unit/recipes/listen_spec.rb:105	haproxy_listen extra options http-request rule should be placed before use_backend rule is expected to render file "/etc/haproxy/haproxy.cfg"	0.25343
spec/unit/recipes/frontend_backend_spec.rb:34	haproxy_frontend create frontend and backend with http-request rule placed before use_backend is expected not to render file "/etc/haproxy/haproxy.cfg" with content /use_backend admin0 if path_beg /admin0.*http-request add-header Test Value/m	0.15584
spec/unit/recipes/cache_spec.rb:45	haproxy_cache create a cache, frontend and backend and verify config is created properly is expected to render file "/etc/haproxy/haproxy.cfg"	0.15181
spec/unit/recipes/frontend_backend_spec.rb:33	haproxy_frontend create frontend and backend with http-request rule placed before use_backend is expected to render file "/etc/haproxy/haproxy.cfg"	0.14857
spec/unit/recipes/defaults_spec.rb:26	haproxy_config_defaults create a cache, frontend and backend and verify config is created properly is expected to render file "/etc/haproxy/haproxy.cfg"	0.11312
spec/unit/recipes/listen_spec.rb:82	haproxy_listen extra options hash with disabled option is expected to render file "/etc/haproxy/haproxy.cfg"	0.09807
spec/unit/recipes/listen_spec.rb:39	haproxy_listen create template with a listen resource is expected to render file "/etc/haproxy/haproxy.cfg"	0.09787
spec/unit/recipes/peer_spec.rb:45	haproxy_peer create a peers section, frontend and backend and verify config is created properly is expected to render file "/etc/haproxy/haproxy.cfg"	0.09272
spec/unit/recipes/mailer_spec.rb:48	haproxy_mailer create a mailer, frontend and backend and verify config is created properly is expected to render file "/etc/haproxy/haproxy.cfg"	0.09218