Upgrade download-artifact action to v4

Author: saudsami

.github/workflows/deploy_docs.yml

@@ -111,7 +111,7 @@ jobs:
         language: ['en']
     steps:
       - name: Download DocC Archive ⬇️
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: ${{ env.PACKAGE_NAME }}-${{ matrix.language }}.doccarchive.zip
       - name: Unzip Archive 😮