chore(deps): bump actions/checkout from 4 to 6

Sourced from actions/checkout's releases.

<h2>v6.0.0</h2> <h2>What's Changed</h2>

• Update README to include Node.js 24 support details and requirements by @​salmanmkc in actions/checkout#2248
• Persist creds to a separate file by @​ericsciple in actions/checkout#2286
• v6-beta by @​ericsciple in actions/checkout#2298
• update readme/changelog for v6 by @​ericsciple in actions/checkout#2311

Full Changelog: https://github.com/actions/checkout/compare/v5.0.0...v6.0.0

<h2>v6-beta</h2> <h2>What's Changed</h2>

Updated persist-credentials to store the credentials under $RUNNER_TEMP instead of directly in the local git config.

This requires a minimum Actions Runner version of v2.329.0 to access the persisted credentials for Docker container action scenarios.

<h2>v5.0.1</h2> <h2>What's Changed</h2>

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

Full Changelog: https://github.com/actions/checkout/compare/v5...v5.0.1

<h2>v5.0.0</h2> <h2>What's Changed</h2>

• Update actions checkout to use node 24 by @​salmanmkc in actions/checkout#2226
• Prepare v5.0.0 release by @​salmanmkc in actions/checkout#2238

<h2>⚠️ Minimum Compatible Runner Version</h2>

v2.327.1
Release Notes

Make sure your runner is updated to this version or newer to use this release.

Full Changelog: https://github.com/actions/checkout/compare/v4...v5.0.0

<h2>v4.3.1</h2> <h2>What's Changed</h2>

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

Full Changelog: https://github.com/actions/checkout/compare/v4...v4.3.1

<h2>v4.3.0</h2> <h2>What's Changed</h2>

• docs: update README.md by @​motss in actions/checkout#1971
• Add internal repos for checking out multiple repositories by @​mouismail in actions/checkout#1977
• Documentation update - add recommended permissions to Readme by @​benwells in actions/checkout#2043

... (truncated)

Sourced from actions/checkout's changelog.

<h1>Changelog</h1> <h2>v6.0.2</h2>

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

<h2>v6.0.1</h2>

• Add worktree support for persist-credentials includeIf by @​ericsciple in actions/checkout#2327

<h2>v6.0.0</h2>

• Persist creds to a separate file by @​ericsciple in actions/checkout#2286
• Update README to include Node.js 24 support details and requirements by @​salmanmkc in actions/checkout#2248

<h2>v5.0.1</h2>

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

<h2>v5.0.0</h2>

• Update actions checkout to use node 24 by @​salmanmkc in actions/checkout#2226

<h2>v4.3.1</h2>

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

<h2>v4.3.0</h2>

• docs: update README.md by @​motss in actions/checkout#1971
• Add internal repos for checking out multiple repositories by @​mouismail in actions/checkout#1977
• Documentation update - add recommended permissions to Readme by @​benwells in actions/checkout#2043
• Adjust positioning of user email note and permissions heading by @​joshmgross in actions/checkout#2044
• Update README.md by @​nebuk89 in actions/checkout#2194
• Update CODEOWNERS for actions by @​TingluoHuang in actions/checkout#2224
• Update package dependencies by @​salmanmkc in actions/checkout#2236

<h2>v4.2.2</h2>

• url-helper.ts now leverages well-known environment variables by @​jww3 in actions/checkout#1941
• Expand unit test coverage for isGhes by @​jww3 in actions/checkout#1946

<h2>v4.2.1</h2>

• Check out other refs/* by commit if provided, fall back to ref by @​orhantoy in actions/checkout#1924

<h2>v4.2.0</h2>

• Add Ref and Commit outputs by @​lucacome in actions/checkout#1180
• Dependency updates by @​dependabot- actions/checkout#1777, actions/checkout#1872

<h2>v4.1.7</h2>

• Bump the minor-npm-dependencies group across 1 directory with 4 updates by @​dependabot in actions/checkout#1739
• Bump actions/checkout from 3 to 4 by @​dependabot in actions/checkout#1697
• Check out other refs/* by commit by @​orhantoy in actions/checkout#1774
• Pin actions/checkout's own workflows to a known, good, stable version. by @​jww3 in actions/checkout#1776

<h2>v4.1.6</h2>

• Check platform to set archive extension appropriately by @​cory-miller in actions/checkout#1732

... (truncated)

• de0fac2 Fix tag handling: preserve annotations and explicit fetch-tags (#2356)
• 064fe7f Add orchestration_id to git user-agent when ACTIONS_ORCHESTRATION_ID is set (...
• 8e8c483 Clarify v6 README (#2328)
• 033fa0d Add worktree support for persist-credentials includeIf (#2327)
• c2d88d3 Update all references from v5 and v4 to v6 (#2314)
• 1af3b93 update readme/changelog for v6 (#2311)
• 71cf226 v6-beta (#2298)
• 069c695 Persist creds to a separate file (#2286)
• ff7abcd Update README to include Node.js 24 support details and requirements (#2248)
• 08c6903 Prepare v5.0.0 release (#2238)
• Additional commits viewable in compare view