Update boards.txt

Co-authored-by: Frederic Pillon <[email protected]>
Signed-off-by: Aurentiaco35 <[email protected]>

Author: Aurentiaco35

boards.txt

@@ -7994,7 +7994,7 @@ GenH7.menu.pnum.GENERIC_H7A3VGTX.build.variant=STM32H7xx/H7A3V(G-I)(H-T)_H7B0VBT
 # Generic H7A3VITx
 GenH7.menu.pnum.GENERIC_H7A3VITX=Generic H7A3VITx
 GenH7.menu.pnum.GENERIC_H7A3VITX.upload.maximum_size=2097152
-GenH7.menu.pnum.GENERIC_H7A3VITX.upload.maximum_data_size=1458176
+GenH7.menu.pnum.GENERIC_H7A3VITX.upload.maximum_data_size=1048576
 GenH7.menu.pnum.GENERIC_H7A3VITX.build.board=GENERIC_H7A3VITX
 GenH7.menu.pnum.GENERIC_H7A3VITX.build.product_line=STM32H7A3xx
 GenH7.menu.pnum.GENERIC_H7A3VITX.build.variant=STM32H7xx/H7A3V(G-I)(H-T)_H7B0VBT_H7B3VI(H-T)