Bump dawidd6/action-download-artifact from 3 to 6

Bumps [dawidd6/action-download-artifact](https://github.com/dawidd6/action-download-artifact) from 3 to 6.
- [Release notes](https://github.com/dawidd6/action-download-artifact/releases)
- [Commits](dawidd6/action-download-artifact@v3...v6)

---
updated-dependencies:
- dependency-name: dawidd6/action-download-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/deploy.yml

@@ -41,7 +41,7 @@ jobs:
           >> "$GITHUB_OUTPUT"
 
       - name: Retrieve ${{ matrix.target }} binary
-        uses: dawidd6/action-download-artifact@v3
+        uses: dawidd6/action-download-artifact@v6
         with:
           workflow: oxipng.yml
           commit: ${{ env.GITHUB_SHA }}