CI: update actions/upload-artifact to v4

Author: hyperbx

.github/workflows/Process.Extensions.yml

@@ -59,7 +59,7 @@ jobs:
 
     # Uploads the compiled Process.Extensions artifacts for 'win-x64'.
     - name: Upload Process.Extensions Artifacts for Windows (x64)
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: Process.Extensions-${{matrix.configuration}}-${{env.PROFILE_WIN_64}}
         path: ${{github.workspace}}\Process.Extensions\bin\${{matrix.configuration}}\net8.0\