Bump actions/cache from 3.0.7 to 3.0.8

* Bump actions/cache from 3.0.7 to 3.0.8

Bumps [actions/cache](https://github.com/actions/cache) from 3.0.7 to 3.0.8.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v3.0.7...v3.0.8)

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

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@v3.0.7
+        uses: actions/cache@v3.0.8
         with:
           path: ${{ runner.workspace }}\Qt
           key: Qt-5.15.2-QtCache
@@ -69,7 +69,7 @@ jobs:
           cached: ${{ steps.cache-qt.outputs.cache-hit }}
 
       - name: Installing Jom
-        if: steps.cache.outputs.cache-hit != 'true'
+        if: steps.cache-qt.outputs.cache-hit != 'true'
         run: SandboxiePlus\install_jom.cmd
 
       - name: Build Sandboxie-Plus 64 bit