chore: bump actions/cache from 2 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 2 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v2...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -26,7 +26,7 @@ jobs:
   #         fetch-depth: 0
 
   #     - name: Cache Composer dependencies
-  #       uses: actions/cache@v2
+  #       uses: actions/cache@v4
   #       with:
   #         path: /tmp/composer-cache
   #         key: ${{ runner.os }}-${{ hashFiles('**/composer.lock') }}
@@ -63,7 +63,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Cache Composer dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: /tmp/composer-cache
           key: ${{ runner.os }}-${{ hashFiles('**/composer.lock') }}