Bump dawidd6/action-download-artifact from 5 to 6 (dipy#43)

Bumps [dawidd6/action-download-artifact](https://github.com/dawidd6/action-download-artifact) from 5 to 6.
- [Release notes](https://github.com/dawidd6/action-download-artifact/releases)
- [Commits](dawidd6/action-download-artifact@v5...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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/preview-html.yml

@@ -13,7 +13,7 @@ jobs:
         output1: ${{ steps.echo_pr_nb.outputs.pr_number }}
       steps:
         - name: Download workflow artifact
-          uses: dawidd6/action-download-artifact@v5
+          uses: dawidd6/action-download-artifact@v6
           with:
             github_token: ${{ secrets.GITHUB_TOKEN }}
             workflow: publish.yml
@@ -58,7 +58,7 @@ jobs:
               id: deploy-preview
               message: "Starting deployment of preview ⏳..."
           - name: Download workflow artifact
-            uses: dawidd6/action-download-artifact@v5
+            uses: dawidd6/action-download-artifact@v6
             with:
               github_token: ${{ secrets.GITHUB_TOKEN }}
               workflow: publish.yml