fix: included pnpm in workflow

Author: JulissaDantes

.github/workflows/coverage-check.yaml

@@ -15,6 +15,10 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@v2
 
+    
+      - name: Install pnpm
+        run: npm install -g pnpm
+
       - name: Set up Node.js
         uses: actions/setup-node@v2
         with: