Update expected ALPN token in QuicDispatcherWriteBlockedListTest. This is so that when cl/290840338 reorders QUIC versions, QuicDispatcherWriteBlockedListTests (running with CurrentSupportedVersions().front() only) can still pass. gfe-relnote: n/a (test-only change) PiperOrigin-RevId: 297568815 Change-Id: I39a6e14ada0e21d57d2cb090b0c5c11837d49f9b