fixup! Make test_drop able to run concurrently

Author: ludfjig

src/hyperlight_host/src/mem/shared_mem.rs

@@ -1413,7 +1413,7 @@ mod tests {
                 // Write data at the given offset
                 hshm.copy_from_slice(&test_data, start_offset).unwrap();
 
-                // Read it backunk optimization works correctly
+                // Read it back
                 let mut read_buf = vec![0u8; test_len];
                 hshm.copy_to_slice(&mut read_buf, start_offset).unwrap();