chore(deps): bump actions/cache from 3 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/ci.yml

@@ -45,7 +45,7 @@ jobs:
         # Without restore keys, we lose the ability to get partial matches on caches, and end
         # up with too many cache misses.
         # Use a "small" suffix to use the build caches where possible, but build caches won't use this
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry/index
@@ -85,7 +85,7 @@ jobs:
         # Rust-cache disables a key feature of actions/cache: restoreKeys.
         # Without restore keys, we lose the ability to get partial matches on caches, and end
         # up with too many cache misses.
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry/index