Add install dependencies to workflow

Author: ruchernchong

.github/workflows/sonarqube.yml

@@ -30,6 +30,9 @@ jobs:
           node-version: '20'
           cache: 'pnpm'
 
+      - name: Install dependencies
+        run: pnpm install
+
       - name: Run tests with coverage
         run: pnpm test:coverage