add upload maximums for artemis_mm_pb

Author: Wenn0101

boards.txt

@@ -250,6 +250,8 @@ sfe_artemis_mm_pb.build.core=arduino
 sfe_artemis_mm_pb.build.variant=SFE_ARTEMIS_MM_PB
 sfe_artemis_mm_pb.build.arch=APOLLO3
 sfe_artemis_mm_pb.build.board=APOLLO3_SFE_ARTEMIS_MM_PB
+sfe_artemis_mm_pb.upload.maximum_size=983040
+sfe_artemis_mm_pb.upload.maximum_data_size=393216
 sfe_artemis_mm_pb.build.export_format=bin
 sfe_artemis_mm_pb.build.defines=
 sfe_artemis_mm_pb.build.includes=