Update actions/checkout action to v5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v3 -> v5
actions/checkout	action	major	v4 -> v5

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Release Notes

actions/checkout (actions/checkout)

v5

Compare Source

v4

Compare Source

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

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Configuration

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[Copilot]

Pull Request Overview

This PR updates the actions/checkout action from v3 and v4 to v5 across GitHub workflow files to use the latest version of the checkout action.

• Updated actions/checkout from v3 to v5 in test workflow
• Updated actions/checkout from v4 to v5 in release workflow (two instances)

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/test.yml	Updated checkout action from v3 to v5
.github/workflows/release.yml	Updated checkout action from v4 to v5 in both build and release jobs

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