[2021] [2.7.0.19] 2x R-60 on SU-17M2 without required modification

Hello

This is not a bug. In the major update, we gave most Rank VI / VII aircraft with multiple missile loadouts the abilty to use 2 x IR missiles from stock.

More details are within the patch notes: https://forum.warthunder.com/index.php?/topic/525861-war-thunder-red-skies-changelog/