Fix artifacts version

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

.github/workflows/test.yml

@@ -36,7 +36,7 @@ jobs:
         mkdir -p artifacts
         docker save pico-hsm-test:bullseye -o artifacts/docker-image.tar
     - name: Temporarily save image
-      uses: actions/upload-artifact@v4.1.7
+      uses: actions/upload-artifact@v4
       with:
         name: docker-artifact
         path: artifacts
@@ -54,7 +54,7 @@ jobs:
       with:
         submodules: recursive
     - name: Retrieve saved image
-      uses: actions/download-artifact@v4.1.7
+      uses: actions/download-artifact@v4
       with:
         name: docker-artifact
         path: artifacts