fix(ci): add explicit pnpm version to deploy-docs workflow

Author: antonreshetov

.github/workflows/deploy-docs.yml

@@ -19,6 +19,8 @@ jobs:
 
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
+        with:
+          version: latest
 
       - name: Setup Node.js
         uses: actions/setup-node@v4