[GRASS-git] [OSGeo/grass] 703976: CI(deps): Update actions/cache action to v4

[renovate[bot]]

  Branch: refs/renovate/branches/renovate/actions-cache-4.x
  Home:   https://github.com/OSGeo/grass
  Commit: 703976f63d7a680405cd793f97eb651ff6fb2f15
      https://github.com/OSGeo/grass/commit/703976f63d7a680405cd793f97eb651ff6fb2f15
  Author: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
  Date:   2024-01-17 (Wed, 17 Jan 2024)

  Changed paths:
    M .github/workflows/macos.yml

  Log Message:
  -----------
  CI(deps): Update actions/cache action to v4