chore(deps): update actions/checkout action to v6 (release-2.16)

[red-hat-konflux]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v2 → v6
actions/checkout	action	major	v4 → v6

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Release Notes

actions/checkout (actions/checkout)

v6

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• Fix tag handling: preserve annotations and explicit fetch-tags by @​ericsciple in #​2356

v5

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• Port v6 cleanup to v5 by @​ericsciple in #​2301

v4

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• Port v6 cleanup to v4 by @​ericsciple in #​2305

v3

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• Fix: Mark test scripts with Bash'isms to be run via Bash
• Add option to fetch tags even if fetch-depth > 0

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Configuration

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Documentation

Find out how to configure dependency updates in MintMaker documentation or see all available configuration options in Renovate documentation.

[openshift-ci]

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