Use a cache keys step to create consistent key and path values.
If `cache == 'always'`, use `actions/cache/restore@v3` and `actions/cache/save@v3`.
Else use the regular `actions/cache@v3` to restore and save (given Action was successful).

… only when `cache="always"`

* v2-branch: (33 commits)
  Try to update tinytex
  Test tinytex version 2024.02
  Try installing in tinytex text workflow
  Upload snapshots in check-release example
  check-r-package artifact names: include explicit id or job index
  Include run & attempt number in check-r-package artifact names
  check-r-package: include arch in artifact name
  R-devel test: add macos-14
  More action version updates
  Update JamesIves/github-pages-deploy-action version in examples
  Update actions versions in examples
  Update setup-tinytex dependencies
  Update pr-push dependencies
  Update pr-fetch dependencies
  Update setup-r dependencies
  Update setup-pandoc dependencies
  Update node actions, switch to node 20
  Upgrade upload-artifact action
  Add `working-directory input to `setup-renv` docs
  Avoid r-project.org URLs
  ...

Update action.yaml

It is better to implement it in pak.

For simplicity.