build: set pnpm version

.github/workflows/deploy-docs.yml

@@ -3,8 +3,8 @@ name: Deploy Documentation site to Pages
 on:
   # Runs on pushes targeting the default branch
   push:
-    branches: ['master']
-    paths: ['docs/**']
+    branches: ["master"]
+    paths: ["docs/**"]
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
@@ -17,7 +17,7 @@ permissions:
 
 # Allow one concurrent deployment
 concurrency:
-  group: 'pages'
+  group: "pages"
   cancel-in-progress: true
 
 jobs:
@@ -51,10 +51,12 @@ jobs:
           fi
       - name: Install pnpm
         uses: pnpm/action-setup@v4
+        with:
+          version: 9.0.6+sha1.648f6014eb363abb36618f2ba59282a9eeb3e879
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
-          node-version: '22'
+          node-version: "22"
           cache: ${{ steps.detect-package-manager.outputs.manager }}
       - name: Setup Pages
         uses: actions/configure-pages@v2