Change of Error Code for Exception enum TryFrom<u8> impl (#869)

Signed-off-by: Shailesh Vashishth <shavashishth@gmail.com>

Author: vshailesh

src/hyperlight_common/src/outb.rs

@@ -77,7 +77,7 @@ impl TryFrom<u8> for Exception {
             19 => SIMDFloatingPointException,
             20 => VirtualizationException,
             30 => SecurityException,
-            0x7F => NoException,
+            0xFF => NoException,
             _ => return Err(anyhow!("Unknown exception code: {:#x}", value)),
         };