[Web] Fix `delayTimeout` type `FlingGestureHandler` (#4471)

## Description

Leftover from #4381: the web handlers' timeout fields were changed to `ReturnType<typeof setTimeout>`. `FlingGestureHandler` was the one that PR missed.

## Test plan

`yarn ts-check` passes

Michał Bert committed 10d ago

80cfa6f9bcee6b7dcd3fb40c305c21a318f8d66c

Parent: 8e8e6c1

Committed by GitHub <noreply@github.com> on 8/26/2026, 7:33:42 AM