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

Author: specmatic-builder

.github/workflows/main.yml

@@ -32,7 +32,7 @@ jobs:
           java-package: 'jre'
 
       - name: Use Node.js 18/x
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}