fix: hide pnpm update message, it's confusing since the pnpm version is locked; update to pnpm 9.15.4 (#33232)

.github/workflows/ui-patterns-tests.yml

@@ -24,7 +24,6 @@ jobs:
       - uses: pnpm/action-setup@v4
         name: Install pnpm
         with:
-          version: 9.10.0
           run_install: false
 
       - name: Use Node.js