chore: add --frozen-lockfile and --child-concurrency flags to pnpm install in CI

Author: jahands

.github/workflows/test-and-check.yml

@@ -20,7 +20,7 @@ jobs:
           node-version: ${{ matrix.node-version }}
           cache: 'pnpm'
       - name: Install dependencies
-        run: pnpm install
+        run: pnpm install --frozen-lockfile --child-concurrency=10
       - name: Syncpack lint
         run: pnpm check:deps
       - name: Run linter