fix(guide/suspense): missing v3.3+ badge in suspensible prop (#3002)

* fix(guide/suspense): missing v3.3+ badge in suspensible prop

Signed-off-by: GitHub <noreply@github.com>

* fix: replace badge with list item

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Signed-off-by: GitHub <noreply@github.com>

Author: ferferga

src/guide/built-ins/suspense.md

@@ -135,6 +135,8 @@ Vue Router has built-in support for [lazily loading components](https://router.v
 
 ## Nested Suspense {#nested-suspense}
 
+- Only supported in 3.3+
+
 When we have multiple async components (common for nested or layout-based routes) like this:
 
 ```vue-html