chore(Cleanup): added new lines to the end of files where they are not present (#17774)

src/server/game/DungeonFinding/LFGMgr.h

@@ -640,4 +640,4 @@ namespace lfg
 
 #define sLFGMgr lfg::LFGMgr::instance()
 
-#endif
+#endif

src/server/game/Server/Packets/PacketUtilities.h

@@ -305,4 +305,4 @@ struct fmt::formatter<WorldPackets::String<MaxBytesWithoutNullTerminator, Valida
     }
 };
 
-#endif // PacketUtilities_h__
+#endif // PacketUtilities_h__