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

Ref: PACT-445

Author: pactflow-renovate-bot[bot]

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
           distribution: 'zulu' 
           java-version: '11'
       - name: Set up Node JS
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
         with:
           node-version: '18'
       - name: Test consumer siren project (js)