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

Author: renovate[bot]

.github/workflows/tests.yml

@@ -21,7 +21,7 @@ jobs:
           submodules: recursive
 
       - name: Install Node.js
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
         with:
           node-version: '22'
           cache: 'npm'