boards: nucleo_u5a5zj_q: Fix storage address

Fix start address of storage partition.
Address did not match reg address of devicetree node, and the size of
the storage partition would make it exceed flash region.

Signed-off-by: Joakim Andersson <[email protected]>

Author: joerchan

boards/st/nucleo_u5a5zj_q/nucleo_u5a5zj_q.dts

@@ -58,7 +58,7 @@
 		};
 		storage_partition: partition@3e2000 {
 			label = "storage";
-			reg = <0x003f0000 DT_SIZE_K(120)>;
+			reg = <0x003e2000 DT_SIZE_K(120)>;
 		};
 
 	};