Updated to comply with new clippy formatting rules (#2336)

## Issue Addressed

The latest version of Rust has new clippy rules & the codebase isn't up to date with them.

## Proposed Changes

Small formatting changes that clippy tells me are functionally equivalent

validator_client/src/http_api/api_secret.rs

@@ -133,7 +133,7 @@ impl ApiSecret {
             ));
         }
 
-        Ok(Self { sk, pk })
+        Ok(Self { pk, sk })
     }
 
     /// Returns the public key of `self` as a 0x-prefixed hex string.