build(deps): bump actions/setup-node from 4 to 6

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 4 to 6.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](https://github.com/actions/setup-node/compare/v4...v6)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/workflow.yml

@@ -25,7 +25,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v5
     - name: Setup Node.js 24.x
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
         node-version: 24.x
         cache: npm

README.md

@@ -4,8 +4,8 @@ This action allows caching dependencies and build outputs to improve workflow ex
 
 >Two other actions are available in addition to the primary `cache` action:
 >
->* [Restore action](./restore/README.md) - Restores a cache. It provides granular ability to restore a cache without having to save it. It accepts the same set of inputs as the cache action.
->* [Save action](./save/README.md) - Saves a cache. It provides granular ability to save a cache without having to restore it, or to do a save at any stage of the workflow job -- not only in post phase.
+>* [Restore action](./restore/README.md)
+>* [Save action](./save/README.md)
 
 [![Tests](https://github.com/actions/cache/actions/workflows/workflow.yml/badge.svg)](https://github.com/actions/cache/actions/workflows/workflow.yml)
 
@@ -369,4 +369,4 @@ You are welcome to still raise bugs in this repo.
 
 ## License
 
-The scripts and documentation in this project are released under the [MIT License](LICENSE)
+The scripts and documentation in this project are released under the [MIT License](LICENSE)