chore: update docs

bootloader/test_infra/src/hook.rs

@@ -56,7 +56,7 @@ fn test_hook_as_string(hook_param: U256) -> String {
 }
 
 fn test_hook_as_int_or_hex(hook_param: U256) -> String {
-    // For long data, it is better to use hex-encoding for greater readibility
+    // For long data, it is better to use hex-encoding for greater readability
     if hook_param > U256::from(u64::max_value()) {
         let mut bytes = [0u8; 32];
         hook_param.to_big_endian(&mut bytes);