Upgrade actions/download-artifact from 3 to 4 version (#1350)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/docker.yml

@@ -120,7 +120,7 @@ jobs:
             }
             return out;
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: ${{ matrix.dist }}-${{ matrix.arch }}-${{ github.run_number }}
           path: docker/coturn/.cache/
@@ -177,7 +177,7 @@ jobs:
                         ||     'edge' }}-${{ matrix.dist }}"
              >> $GITHUB_OUTPUT
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           path: docker/coturn/.cache/