Bump up to actions/upload-artifact@v4

Author: pramsey

.github/workflows/ci.yml

@@ -278,7 +278,7 @@ jobs:
 
     - name: 'Upload Valgrind Log'
       if: failure()
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: valgrind-log
         path: build/Testing/Temporary/MemoryChecker.**.log