fix(useTransition): call pause() to stop useRafFn when disabling (#2360)

Co-authored-by: 李众豪 <lizhonghao@fsyhlz.com>
Co-authored-by: Anthony Fu <anthonyfu117@hotmail.com>

packages/core/useTransition/index.ts

@@ -199,15 +199,19 @@ export function useTransition(
   const timeout = useTimeoutFn(start, delay, { immediate: false })
 
   watch(sourceVector, () => {
-    if (unref(disabled)) {
+    if (unref(disabled))
+      return
+    if (unref(delay) <= 0)
+      start()
+    else timeout.start()
+  }, { deep: true })
+
+  watch(() => unref(disabled), (v) => {
+    if (v) {
       outputVector.value = sourceVector.value.slice(0)
+      pause()
     }
-    else {
-      if (unref(delay) <= 0)
-        start()
-      else timeout.start()
-    }
-  }, { deep: true })
+  })
 
   return computed(() => {
     const targetVector = unref(disabled) ? sourceVector : outputVector