Add sample for Map.asSequence (#5055)

libraries/stdlib/common/src/generated/_Maps.kt

@@ -584,6 +584,8 @@ public inline fun <K, V> Map<out K, V>.asIterable(): Iterable<Map.Entry<K, V>> {
 
 /**
  * Creates a [Sequence] instance that wraps the original map returning its entries when being iterated.
+ * 
+ * @sample samples.collections.Sequences.Building.sequenceFromMap
  */
 public fun <K, V> Map<out K, V>.asSequence(): Sequence<Map.Entry<K, V>> {
     return entries.asSequence()