fix(h7): WeActMiniH723VGTX board definition

Fixes #2886.

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

Author: fpistm

boards.txt

@@ -9544,7 +9544,7 @@ GenH7.menu.pnum.WeActMiniH723VGTX.upload.maximum_size=1048576
 GenH7.menu.pnum.WeActMiniH723VGTX.upload.maximum_data_size=327680
 GenH7.menu.pnum.WeActMiniH723VGTX.build.board=WeActMiniH723VGTX
 GenH7.menu.pnum.WeActMiniH723VGTX.build.product_line=STM32H723xx
-GenH7.menu.pnum.WeActMiniH750VBTX.build.variant_h=variant_WeActMiniH7xx.h
+GenH7.menu.pnum.WeActMiniH723VGTX.build.variant_h=variant_WeActMiniH723VGTX.h
 GenH7.menu.pnum.WeActMiniH723VGTX.build.variant=STM32H7xx/H723V(E-G)(H-T)_H730VB(H-T)_H733VG(H-T)
 GenH7.menu.pnum.WeActMiniH723VGTX.debug.svd_file={runtime.tools.STM32_SVD.path}/svd/STM32H7xx/STM32H723.svd