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] <[email protected]>

.github/workflows/ci.yml

@@ -22,12 +22,12 @@ jobs:
           distribution: 'temurin'
           java-version: '11'
       - name: Cache Coursier
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/coursier
           key: sbt-coursier-${{ hashFiles('project/*.sbt', 'project/*.scala') }}
       - name: Cache SBT
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.sbt
           key: sbt-${{ hashFiles('project/build.properties', 'project/plugins.sbt') }}
@@ -49,12 +49,12 @@ jobs:
           distribution: 'temurin'
           java-version: '11'
       - name: Cache Coursier
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/coursier
           key: sbt-coursier-${{ hashFiles('project/*.sbt', 'project/*.scala') }}
       - name: Cache SBT
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.sbt
           key: sbt-${{ hashFiles('project/build.properties', 'project/plugins.sbt') }}