chore(deps): update pnpm/action-setup action to v4

Author: renovate[bot]

.github/workflows/node.js.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - uses: pnpm/action-setup@v2
+    - uses: pnpm/action-setup@v4
       with:
         version: 9.6.0
     - name: ⎔ Setup node

.github/workflows/playwright.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4  
-    - uses: pnpm/action-setup@v2
+    - uses: pnpm/action-setup@v4
       with:
         version: 9.6.0      
     - uses: actions/setup-node@v4