chore: update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/CI.yml

@@ -9,7 +9,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v5
     - name: Use Node.js
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@v6
       with:
         node-version: 20
         cache: 'npm'

.github/workflows/DMN_TCK.yml

@@ -16,7 +16,7 @@ jobs:
         repository: dmn-tck/tck
         path: tmp/dmn-tck
     - name: Use Node.js
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@v6
       with:
         node-version: 20
         cache: 'npm'

.github/workflows/DMN_TCK_UPDATE.yml

@@ -17,7 +17,7 @@ jobs:
         repository: dmn-tck/tck
         path: tmp/dmn-tck
     - name: Use Node.js
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@v6
       with:
         node-version: 20
         cache: 'npm'