Core/Packet: send SMSG_QUESTGIVER_STATUS_MULTIPLE when the player levels up. (#23434)

Ensures that nearby questgivers are properly updated and will offer quests unlocked at the new level reached.

src/server/game/Entities/Player/Player.cpp

@@ -2668,6 +2668,8 @@ void Player::GiveLevel(uint8 level)
                     SetByteFlag(PLAYER_FIELD_BYTES, PLAYER_FIELD_BYTES_OFFSET_RAF_GRANTABLE_LEVEL, 0x01);
             }
 
+    SendQuestGiverStatusMultiple();
+
     sScriptMgr->OnPlayerLevelChanged(this, oldLevel);
 }