Bump actions/cache from 2 to 3 (#778)

Bumps [actions/cache](https://github.com/actions/cache) from 2 to 3.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v2...v3)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/CI.yml

@@ -36,7 +36,7 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: '21'
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: ~/.cache
           key: ${{ runner.os }}-jdk21-${{ hashFiles('**/*.sbt') }}
@@ -54,7 +54,7 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: '17'
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: ~/.cache
           key: ${{ runner.os }}-jdk17-${{ hashFiles('**/*.sbt') }}
@@ -72,7 +72,7 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: '11'
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: ~/.cache
           key: ${{ runner.os }}-jdk11-${{ hashFiles('**/*.sbt') }}
@@ -90,7 +90,7 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: '8'
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: ~/.cache
           key: ${{ runner.os }}-jdk8-${{ hashFiles('**/*.sbt') }}