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 (0.48 seconds, 62.34% of total time)

Example	Description	Time in seconds
spec/unit/resources/manage_spec.rb:154	certificate_manage with combined file is expected to create template "/etc/pki/tls/certs/fauxhai.local.pem"	0.11257
spec/unit/resources/manage_spec.rb:141	certificate_manage when not creating subdirs is expected to create template "/etc/pki/tls/Fauxhai-bundle.crt"	0.06302
spec/unit/recipes/default_spec.rb:8	certificate::default is expected to create certificate_manage "Fauxhai"	0.05784
spec/unit/resources/manage_spec.rb:59	certificate_manage with default options on ubuntu is expected to create directory "/etc/ssl/certs"	0.04016
spec/unit/resources/manage_spec.rb:176	certificate_manage with nginx cert is expected to create template "/etc/pki/tls/certs/fauxhai.local.pem"	0.03792
spec/unit/resources/manage_spec.rb:27	certificate_manage with default options on centos is expected to create directory "/etc/pki/tls/certs"	0.03645
spec/unit/resources/manage_spec.rb:136	certificate_manage when not creating subdirs is expected not to create directory "/etc/pki/tls/certs"	0.03459
spec/unit/recipes/manage_by_attributes_spec.rb:28	certificate::manage_by_attributes is expected to create certificate_manage "foo"	0.03286
spec/unit/resources/manage_spec.rb:101	certificate_manage with plaintext is expected to create template "/etc/pki/tls/certs/fauxhai.local.pem"	0.03272
spec/unit/resources/manage_spec.rb:109	certificate_manage with plaintext is expected to create template "/etc/pki/tls/private/fauxhai.local.key"	0.03207

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