Bump actions/cache from 3 to 4 (#202)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Adam Li <adam2392@gmail.com>

.github/workflows/main.yml

@@ -79,7 +79,7 @@ jobs:
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
 
       - name: Setup compiler cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-ccachev1
         # Reference: https://docs.github.com/en/actions/guides/caching-dependencies-to-speed-up-workflows#matching-a-cache-key
         # NOTE: The caching strategy is modeled in a way that it will always have a unique cache key for each workflow run
@@ -186,7 +186,7 @@ jobs:
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
 
       - name: Setup compiler cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: cache-ccachev1
         # Reference: https://docs.github.com/en/actions/guides/caching-dependencies-to-speed-up-workflows#matching-a-cache-key
         # NOTE: The caching strategy is modeled in a way that it will always have a unique cache key for each workflow run