chore(deps): update actions/setup-node action to v6 (#858)

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

Author: renovate[bot]

.github/workflows/gh-pages.yml

@@ -30,7 +30,7 @@ jobs:
           restore-keys: ${{ runner.os }}-
 
       - name: Install Node
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
 
       - name: Build WASM
         run: wasm-pack build --target web && cd pkg && npm install