Stabilize JsonPrimitive constructor functions that accept unsigned types

They're been around for some time without much complaints

Author: sandwwraith

formats/json/commonMain/src/kotlinx/serialization/json/JsonElement.kt

@@ -66,23 +66,20 @@ public fun JsonPrimitive(value: Number?): JsonPrimitive {
  *
  * The value will be encoded as a JSON number.
  */
-@ExperimentalSerializationApi
 public fun JsonPrimitive(value: UByte): JsonPrimitive = JsonPrimitive(value.toULong())
 
 /**
  * Creates a numeric [JsonPrimitive] from the given [UShort].
  *
  * The value will be encoded as a JSON number.
  */
-@ExperimentalSerializationApi
 public fun JsonPrimitive(value: UShort): JsonPrimitive = JsonPrimitive(value.toULong())
 
 /**
  * Creates a numeric [JsonPrimitive] from the given [UInt].
  *
  * The value will be encoded as a JSON number.
  */
-@ExperimentalSerializationApi
 public fun JsonPrimitive(value: UInt): JsonPrimitive = JsonPrimitive(value.toULong())
 
 /**
@@ -91,7 +88,6 @@ public fun JsonPrimitive(value: UInt): JsonPrimitive = JsonPrimitive(value.toULo
  * The value will be encoded as a JSON number.
  */
 @SuppressAnimalSniffer // Long.toUnsignedString(long)
-@ExperimentalSerializationApi
 public fun JsonPrimitive(value: ULong): JsonPrimitive = JsonUnquotedLiteral(value.toString())
 
 /** Creates a [JsonPrimitive] from the given string. */