Update pr-checks.yml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: groupthinking

.github/workflows/pr-checks.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: '18.x'
           cache: 'npm'
 
       - name: Install dependencies