chore(deps): update github artifact actions (#288)

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

Author: renovate[bot]

.github/workflows/website.yml

@@ -68,7 +68,7 @@ jobs:
               working-directory: book
 
             - name: Upload artifact
-              uses: actions/upload-artifact@v6
+              uses: actions/upload-artifact@v7
               with:
                   name: book
                   path: book/dist
@@ -92,7 +92,7 @@ jobs:
                   fetch-depth: 0
 
             - name: Download artifacts
-              uses: actions/download-artifact@v7
+              uses: actions/download-artifact@v8
               with:
                   path: dist
                   merge-multiple: true