chore(deps): update actions/upload-artifact action to v5

Author: renovate[bot]

.github/workflows/buildroot-e2e.yml

@@ -64,7 +64,7 @@ jobs:
       # Upload docker image
       - name: Upload Docker container image artifact
         if: matrix.build-os == 'ubuntu-latest'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: docker-image.tar
           path: ${{ github.workspace }}/workflow-artifacts/docker-image.tar

.github/workflows/devices.yml

@@ -97,7 +97,7 @@ jobs:
           tar -cvf ./workflow-artifacts/images.tar.gz --exclude="rootfs.cpio" -C ./workspaces/$SKIFF_WORKSPACE/images/ ./
 
       # Upload system image
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: images-${{ matrix.skiffconf }}.tar.gz
           path: ${{ github.workspace }}/workflow-artifacts/images.tar.gz