Clarify WebTransport use cases for IPFS (#1709)

Author: lidel

docs/how-to/webtransport.md

@@ -34,9 +34,8 @@ WebTransport in Kubo unlocks many use cases, including those listed below.
 
 - Browser nodes or light clients can function as "full" peers in a decentralized network.
 - Browser nodes can gossip directly with their peers, meaning they can receive and submit messages directly without relying on centralized infrastructure or interfaces like an HTTP/GraphQL API.
-- Browser extension cryptocurrency wallets can submit transactions directly to the blockchain.
 - Fetch data from the [DHT](../concepts/dht.md) by directly connecting to a DHT server node.
-- Upload to [Filecoin](https://docs.filecoin.io/) directly from the browser.
+- Upload data directly from the browser to long-term storage such as a [pinning service](../concepts/persistence.md).
 - Decentralized peer-to-peer video streaming as a dApp.
 
 ## Using WebTransport with Kubo