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

Author: renovate[bot]

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
       - uses: actions/checkout@v5
         with:
           fetch-depth: 0
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           cache: npm
           node-version: ${{matrix.node}}
@@ -33,7 +33,7 @@ jobs:
       - uses: actions/checkout@v5
         with:
           fetch-depth: 0
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           cache: npm
           node-version: lts/*

.github/workflows/website.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: lts/*
       - run: npm ci