cache pnpm config (#140)

Fix the workflow config

.github/workflows/build.yml

@@ -1,36 +1,31 @@
 name: Typescript Client CI
-
 on:
   push:
     branches: [ main ]
   pull_request:
     branches: [ main ]
-
 jobs:
   build:
     runs-on: ubuntu-latest
-
     strategy:
       matrix:
         node-version: [22.x]
-
     steps:
     - name: Checkout
       uses: actions/checkout@v4
+    - name: Install pnpm
+      uses: pnpm/action-setup@v2
+      with:
+        version: 8
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'pnpm'
         cache-dependency-path: pnpm-lock.json
-    - name: Install pnpm
-      uses: pnpm/action-setup@v2
-      with:
-        version: 8
     - name: Install dependencies
       run: pnpm install
     - name: Run lint
       run: pnpm run lint
     - name: Run build
-      run: pnpm run build
-    # - run: pnpm run test # TODO: add mock env for testing
+      run: pnpm run build