Fix incorrect class reference to DM51 in backpacks
BWA3_DM51
should be BWA3_DM51A1
, https://git.koffeinflummi.de/bwmod-team/bwa3-public/-/blob/master/bwa3_handgrenades/CfgMagazines.hpp#L3
BWA3_DM51
should be BWA3_DM51A1
, https://git.koffeinflummi.de/bwmod-team/bwa3-public/-/blob/master/bwa3_handgrenades/CfgMagazines.hpp#L3