Suspense: timeout is in milliseconds (#3261)

Author: simon04

src/guide/built-ins/suspense.md

@@ -91,7 +91,7 @@ If no async dependencies were encountered during the initial render, `<Suspense>
 
 Once in a resolved state, `<Suspense>` will only revert to a pending state if the root node of the `#default` slot is replaced. New async dependencies nested deeper in the tree will **not** cause the `<Suspense>` to revert to a pending state.
 
-When a revert happens, fallback content will not be immediately displayed. Instead, `<Suspense>` will display the previous `#default` content while waiting for the new content and its async dependencies to be resolved. This behavior can be configured with the `timeout` prop: `<Suspense>` will switch to fallback content if it takes longer than `timeout` to render the new default content. A `timeout` value of `0` will cause the fallback content to be displayed immediately when default content is replaced.
+When a revert happens, fallback content will not be immediately displayed. Instead, `<Suspense>` will display the previous `#default` content while waiting for the new content and its async dependencies to be resolved. This behavior can be configured with the `timeout` prop: `<Suspense>` will switch to fallback content if it takes longer than `timeout` milliseconds to render the new default content. A `timeout` value of `0` will cause the fallback content to be displayed immediately when default content is replaced.
 
 ## Events {#events}