Bump actions/cache from 2 to 3.0.0

Bumps [actions/cache](https://github.com/actions/cache) from 2 to 3.0.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](https://github.com/actions/cache/compare/v2...v3.0.0)

---
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>

.github/workflows/main.yml

@@ -43,7 +43,7 @@ jobs:
 
       - name: Cache Qt
         id: cache-qt
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.0
         with:
           path: ${{ runner.workspace }}\Qt
           key: Qt-5.15.2-QtCache