Switch to actions/cache@v4

[willryan-stemcell]

actions/cache@v4 was released a couple of weeks ago and moves to Node 20. Please update your reference to use the new version:
https://github.com/actions/cache/releases/tag/v4.0.0

Fixed #253

Description

Switch to actions/cache@v4

Motivation and context

When using composer-install I get this message:

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/cache@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

How has this been tested?

Verified locally

Types of changes

• 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)

PR checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING.md document.
• I have added tests to cover my changes.

[ruudk]

@ramsey You're probably very busy. Could you merge and tag this? It removes a deprecation on all our workflows. Thanks 💙

[jrfnl]

Duplicate of PR #252 which was already open for the same.