ci: correctly setup pnpm

Author: sergeysova

.github/workflows/publish.yml

@@ -6,15 +6,18 @@ on:
 
 jobs:
   publish-to-npm:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+      
+      - name: 📦 Setup pnpm
+        uses: pnpm/action-setup@v2
 
-      - name: Use Node.js 16.x
+      - name: Use Node.js 18.x
         uses: actions/setup-node@v3
         with:
-          node-version: 16.x
+          node-version: 18.x
           cache: 'pnpm'
 
       - name: Install dependencies