Fix J decode wrong immediate

TODO recheck maybe

src/cpu/rv32cpu.c

@@ -68,7 +68,7 @@ static void cpu_decode(raw_instruction_t raw_instruction, instruction_t* output)
 			// Then following 10 bits (30-21) are immediate bits 10-1
 			output->immediate |= (raw_instruction.data & 0x7FE00000) >> 20;
 			// Following bit (20) is immediate bit 11
-			output->immediate |= (raw_instruction.data & 0x200000) >> 10;
+			output->immediate |= (raw_instruction.data & 0x200000) >> 9;
 			// Last bits (19-12) are immediate bits 19-12
 			output->immediate |= (raw_instruction.data & 0xFF000);
 			break;