CI: consider adding npm dependency caching to setup-node step

I was exploring the CI workflow as part of my university project on GitHub Actions and noticed that the setup-node step doesn't currently include dependency caching. The current setup-node step looks like this: - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0 with: node-version: 'lts/*' Adding cache: 'npm' would allow GitHub Actions to cache node_modules between runs, which can reduce install time on repeated builds: - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0 with: node-version: 'lts/*' cache: 'npm' I tested this on my own Node.js project and it worked without any other changes needed. I appreciate this may already be a considered decision, so happy to hear if there's a reason it's been left out.