chore(deps): update actions/checkout action to v4

[renovate[bot]]

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This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v3 -> v4

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Release Notes

actions/checkout (actions/checkout)

v4

Compare Source

• Check out other refs/* by commit if provided, fall back to ref by @​orhantoy in https://github.com/actions/checkout/pull/1924

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Configuration

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[jhthorsen]

See https://github.com/convos-chat/convos/pull/848#issuecomment-2010936160