chore: try a different pnpm cache mechanism since cached image says i…

…t's not installed

.github/workflows/build-test-wasm.yml

@@ -41,14 +41,25 @@ jobs:
         uses: actions/setup-node@v4
         if: ${{ !matrix.settings.docker }}
         with:
-          cache: 'pnpm'
           node-version: 20
       - name: Install pnpm
         id: pnpm-install
         uses: pnpm/action-setup@v3
         with:
           version: 9.8.0
           run_install: false
+      - name: Get pnpm store directory
+        id: pnpm-cache
+        shell: bash
+        run: |
+            echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT
+      - name: Setup pnpm cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
       - name: Cache cargo
         uses: actions/cache@v4
         with: