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

Author: renovate[bot]

.github/workflows/build-test.yml

@@ -258,7 +258,7 @@ jobs:
           save-if: false
 
       - name: Install Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: "22"
 

.github/workflows/release.yml

@@ -99,7 +99,7 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 'lts/*'