feat: Add link to known identifiers

ext/native-decls/GetPlayerIdentifierByType.md

@@ -9,6 +9,7 @@ char* GET_PLAYER_IDENTIFIER_BY_TYPE(char* playerSrc, char* identifierType);
 ```
 
 Get an identifier from a player by the type of the identifier.
+Known [Identifiers](https://docs.fivem.net/docs/scripting-reference/runtimes/lua/functions/GetPlayerIdentifiers/#identifier-types)
 
 ## Parameters
 
@@ -52,4 +53,4 @@ EventHandlers["playerJoining"] += new Action<Player>(SetLicense);
 private void SetLicense([FromSource]Player player) {
     PlayerLicenses.Add(player.Handle, GetPlayerIdentifierByType(player.Handle, "license"));
 }
-```
+```