Update docs.

site/content/docs/02-template-syntax.md

@@ -470,6 +470,7 @@ The following modifiers are available:
 
 * `preventDefault` — calls `event.preventDefault()` before running the handler
 * `stopPropagation` — calls `event.stopPropagation()`, preventing the event reaching the next element
+* `stopImmediatePropagation` - calls `event.stopImmediatePropagation()`, preventing other listeners of the same event from being fired.
 * `passive` — improves scrolling performance on touch/wheel events (Svelte will add it automatically where it's safe to do so)
 * `capture` — fires the handler during the *capture* phase instead of the *bubbling* phase
 * `once` — remove the handler after the first time it runs