chore(deps): update actions/checkout action to v6.0.3

[anaconda-renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	patch	v6.0.2 → v6.0.3

renovate update details

Field	Value
manager	github-actions
categories	ci
datasource	github-tags
depName	actions/checkout
depType¹	action
packageName	actions/checkout
sourceUrl	https://github.com/actions/checkout
updateType	patch
versioning	regex:^v?(?\d+)(.(?\d+).(?\d+))?$

¹ only available for some managers

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Release Notes

actions/checkout (actions/checkout)

v6.0.3

Compare Source

• Fix checkout init for SHA-256 repositories by @​yaananth in #​2439
• fix: expand merge commit SHA regex and add SHA-256 test cases by @​yaananth in #​2414

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