bump pnpm/action-setup version

Author: samwillis

.github/workflows/e2e-tests.yml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v3
+        uses: pnpm/action-setup@v4
         with:
           version: 10.19.0