chore(ga): 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/benchmarks.yml

@@ -30,7 +30,7 @@ jobs:
           extensions: bcmath, mbstring, intl, sodium, json
 
       - name: "caching dependencies"
-        uses: "actions/cache@v3"
+        uses: "actions/cache@v4"
         with:
           path: |
             ~/.composer/cache

.github/workflows/mutation-tests.yml

@@ -30,7 +30,7 @@ jobs:
           extensions: bcmath, mbstring, intl, sodium, json
 
       - name: "caching dependencies"
-        uses: "actions/cache@v3"
+        uses: "actions/cache@v4"
         with:
           path: |
             ~/.composer/cache

.github/workflows/unit-tests.yml

@@ -35,7 +35,7 @@ jobs:
           extensions: bcmath, mbstring, intl, sodium, json
 
       - name: "caching dependencies"
-        uses: "actions/cache@v3"
+        uses: "actions/cache@v4"
         with:
           path: |
             ~/.composer/cache