Update actions/cache to v4 in unity-tests workflow

Author: IvanMurzak

.github/workflows/unity-tests.yml

@@ -29,7 +29,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           lfs: false
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: ${{ matrix.projectPath }}/Library
           key: Library-${{ matrix.projectPath }}
@@ -47,14 +47,4 @@ jobs:
           artifactsPath: ${{ matrix.testMode }}-artifacts
           githubToken: ${{ secrets.GITHUB_TOKEN }}
           checkName: ${{ matrix.unityVersion }} ${{ matrix.testMode }} Test Results
-          coverageOptions: 'generateAdditionalMetrics;generateHtmlReport;generateBadgeReport;assemblyFilters:+my.assembly.*'
-      - uses: actions/upload-artifact@v4
-        if: always()
-        with:
-          name: Test results for ${{ matrix.unityVersion }} ${{ matrix.testMode }}
-          path: ${{ steps.tests.outputs.artifactsPath }}
-      - uses: actions/upload-artifact@v4
-        if: always()
-        with:
-          name: Coverage results for ${{ matrix.unityVersion }} ${{ matrix.testMode }}
-          path: ${{ steps.tests.outputs.coveragePath }}
+