docs: update description for Yarn updates

[MikeMcC399]

Description

Reformulate the description for Yarn updates in the CONTRIBUTING document.

Motivation and Context

• The CONTRIBUTING document describes updating Yarn v1 Classic versions. The details are no longer needed as Yarn v1 is frozen at 1.22.22 and hasn't had an update since 2024.
• Yarn v1 is planned for removal with Node.js 26
• The example ./update.sh 6.10 is incorrect, as the script only accepts Node.js major versions as a parameter. See update.sh. Possibly 6,10 was intended, as a list of major versions.

Testing Details

N/A - documentation only

Types of changes

• Documentation
• Version change (Update, remove or add more Node.js versions)
• Variant change (Update, remove or add more variants, or versions of variants)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Other (none of the above)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING.md document.
• All new and existing tests passed.

[MikeMcC399]

Preview

• https://github.com/MikeMcC399/docker-node/blob/yarn-update-description/CONTRIBUTING.md#version-updates

[nschonni]

I opened #2416 that might conflict with some of these explainations. Open to suggested wording on that one if it lands.

[MikeMcC399]

@nschonni

I opened #2416 that might conflict with some of these explainations. Open to suggested wording on that one if it lands.

I like your proposed change, so I've changed this one to draft for the time being. I'll expect to ultimately close it unmerged.

[MikeMcC399]

I've reviewed and tested #2416, so I'm now closing this one.