Update code coverage upload action

Author: jacomago

.github/workflows/codecov.yml

@@ -53,7 +53,7 @@ jobs:
         min-coverage-overall: 40
         min-coverage-changed-files: 60
     - name: Upload Code Coverage Artifacts
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v3
       if: success() || failure() # always run even if the previous step fails
       with:
         name: code-coverage-reports