fix(Link): ensure target _blank is flagged as external for Inertia (#4746)

Co-authored-by: Benjamin Canac <[email protected]>

Author: Barbapapazes

src/runtime/inertia/components/Link.vue

@@ -100,6 +100,10 @@ const ui = computed(() => tv({
 const href = computed(() => props.to ?? props.href)
 
 const isExternal = computed(() => {
+  if (props.target === '_blank') {
+    return true
+  }
+
   if (props.external) {
     return true
   }