refactor: set node version via .nvmrc (#551)

Update pull-request.yml

Author: mfranzke

.github/workflows/pull-request.yml

@@ -15,9 +15,11 @@ jobs:
 
       - name: Set up NodeJS
         uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
 
       - name: Install dependencies
-        run: npm install
+        run: npm ci
 
       - name: Run tests
         run: npm test