ServiceWorker

96e4795d - Ensure "race-network-and-fetch-handler" is used with a fetch handler

Ensure "race-network-and-fetch-handler" is used with a fetch handler As covered in https://github.com/WICG/service-worker-static-routing-api?tab=readme-ov-file#how-does-it-work-if-there-is-no-fetch-handler, the fetch handler must exists not only for the "fetch-handler" source but also the "race-network-and-fetch-handler" source. The "race-network-and-fetch-handler" source was not written in the last update.