ci(github): add check code style step to lint-source workflow

Author: phatpham9

.github/workflows/lint-source.yml

@@ -13,5 +13,7 @@ jobs:
           registry-url: https://registry.npmjs.org
       - name: Install dependencies
         run: yarn
+      - name: Check code style
+        run: yarn format:check
       - name: Check code quality
         run: yarn lint