Bump actions/download-artifact from 3 to 4

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci.yml

@@ -58,7 +58,7 @@ jobs:
     - name: Install NPM dependencies
       run: npm install
     - name: Download
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         # Artifact name
         name: wheel-artifacts
@@ -124,7 +124,7 @@ jobs:
         lfs: true
         submodules: 'recursive'
     - name: Download
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         # Artifact name
         name: feelpp-project-artifacts
@@ -174,13 +174,13 @@ jobs:
           lfs: true
           submodules: 'recursive'      
       - name: Download Deb Packages
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           # Artifact name
           name: feelpp-project-artifacts
           path: artifacts/
       - name: Download Wheel Packages
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           # Artifact name
           name: wheel-artifacts