chore: update build workflow file

Author: joshsny

.github/workflows/build.yml

@@ -17,6 +17,11 @@ jobs:
         with:
           node-version-file: 'package.json'
           cache: 'pnpm'
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 9.15.5
+          run_install: false
       - name: Install dependencies with pnpm
         run: pnpm install --frozen-lockfile
       - name: Build
@@ -41,6 +46,11 @@ jobs:
         with:
           node-version-file: 'package.json'
           cache: 'pnpm'
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 9.15.5
+          run_install: false
       - name: Install dependencies with pnpm
         run: pnpm install --frozen-lockfile
       - name: Run Linter
@@ -59,9 +69,13 @@ jobs:
       - name: Set up Node
         uses: actions/setup-node@v4
         with:
-          node-version-file: 'package.json'
           node-version: ${{ matrix.node }}
           cache: 'pnpm'
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 9.15.5
+          run_install: false
       - name: Install dependencies with pnpm
         run: pnpm install --frozen-lockfile
       - name: Run Unit Tests