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

Author: renovate[bot]

.github/workflows/release-npm.yml

@@ -15,7 +15,7 @@ jobs:
     environment: Release
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: '24.x'
           cache: 'npm'

.github/workflows/stryker-javascript.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-node@v5
+    - uses: actions/setup-node@v6
       with:
         node-version: '22'
         cache: 'npm'

.github/workflows/test-javascript.yml

@@ -29,7 +29,7 @@ jobs:
       run: git config --global core.autocrlf input
     - uses: actions/checkout@v5
     - name: with Node.js ${{ matrix.node-version }} on ${{ matrix.os }}
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@v6
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'npm'