chore(deps): Bump actions/download-artifact from 4.1.9 to 4.2.1 (#406)

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -235,12 +235,12 @@ jobs:
         run: nix develop --impure .#ci
 
       - name: Download docker image
-        uses: actions/download-artifact@cc203385981b70ca67e1cc392babf9cc229d5806 # v4.1.9
+        uses: actions/download-artifact@95815c38cf2ff2164869cbab79da8d1f422bc89e # v4.2.1
         with:
           name: "[container-image] Docker tarball"
 
       - name: Download helm chart
-        uses: actions/download-artifact@cc203385981b70ca67e1cc392babf9cc229d5806 # v4.1.9
+        uses: actions/download-artifact@95815c38cf2ff2164869cbab79da8d1f422bc89e # v4.2.1
         with:
           name: "[helm-chart] package"