chore(deps): update github artifact actions (#62)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/website.yml

@@ -63,7 +63,7 @@ jobs:
               working-directory: book
 
             - name: Upload artifact
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@v5
               with:
                   name: book
                   path: book/dist
@@ -85,7 +85,7 @@ jobs:
                   fetch-depth: 0
 
             - name: Download artifacts
-              uses: actions/download-artifact@v5
+              uses: actions/download-artifact@v6
               with:
                   path: dist
                   merge-multiple: true