fix: broken cicd pipeline (#9)

* fix: deprecated action usage

* fix: deprecated action usage

Author: jobulcke

.github/workflows/build-project.yml

@@ -56,7 +56,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
       - name: Download JARs
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: artifacts
           path: .github

.github/workflows/pr-merged.yml

@@ -68,7 +68,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
       - name: Download JARs
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: artifacts
           path: .github