fix(e2e): update plugin-e2e.yaml ref to hugh/fix-e2e-playwright-install-pnpm

Updates reusable workflow ref to include Playwright cache + retry fix from
PR privilegedescalation/.github#145.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.github/workflows/e2e.yaml

@@ -16,7 +16,7 @@ concurrency:
 
 jobs:
   e2e:
-    uses: privilegedescalation/.github/.github/workflows/plugin-e2e.yaml@hugh/add-pnpm-support-plugin-e2e
+    uses: privilegedescalation/.github/.github/workflows/plugin-e2e.yaml@hugh/fix-e2e-playwright-install-pnpm
     with:
       node-version: "22"
       headlamp-version: v0.40.1