Update history

Author: Rangi42

HISTORY.md

@@ -103,4 +103,4 @@
   - Added registers and constants for more MBCs
   - Added `PAD_*` constants for combined button and Control Pad masks
   - Added `B_COLOR_*` red/green/blue bit numbers
-  - Corrected comment on `B_BG_PRIO`
+  - Corrected comments on `B_BG_PRIO` and `B_OAM_PRIO`