chore: updated github workflow

Author: teneko

.github/workflows/build-test-pack-publish.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Pack projects
         run: dotnet pack --no-restore
       - name: Upload packages (artifacts)
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: nuget-packages
           path: |
@@ -70,7 +70,7 @@ jobs:
     steps:
       - name: Download package artifacts
         id: download-artifacts
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         continue-on-error: true
       - name: Push nupkg's
         id: push-nupkg