add comment + install yarn first

.github/workflows/npm_test_doc.yml

@@ -13,6 +13,8 @@ jobs:
         # node-version: ['18', '19', '20', '21', '22', 'lts/*'] 
         node-version: ['lts/*'] 
     steps:
+    - name: Install yarn@berry first
+      run: npm install -g yarn@berry && yarn set version 4.2.1 && yarn --version
     - uses: actions/checkout@v4
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v4
@@ -24,8 +26,6 @@ jobs:
       with:
         path: node_modules
         key: ${{ runner.os }}-${{ matrix.node-version }}-${{ hashFiles('yarn.lock') }}
-    - name: Install yarn@berry
-      run: npm install -g yarn@berry && yarn set version 4.2.1 && yarn --version
     - name: Package install
       if: steps.cache.outputs.cache-hit != 'true'
       run: yarn install

.yarnrc.yml

@@ -1,6 +1,7 @@
 nodeLinker: node-modules
 enableInlineHunks: true
 supportedArchitectures:
+  # wasm32 is needed by @node-rs/xxhash-wasm32-wasi otherwise it is not installed
   cpu:
     - current
     - wasm32

package.json

@@ -5,7 +5,7 @@
   "main": "./dist/mjs/index.mjs",
   "browser": "./dist/mjs/index.mjs",
   "type": "module",
-  "os": [
+  "cpu": [
     "!wasm32",
     "wasm32"
   ],