Update download artifact action to version 4 in On Release workflow

Author: Antoine

.github/workflows/OnRelease.yml

@@ -92,7 +92,7 @@ jobs:
 
     steps:
     - name: download code coverage reports
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: code-coverage-report-3.10