chore: comment marker fixes (#4406)

Upgrading to rust 1.70 will require these.

proxy/src/console.rs

@@ -1,5 +1,5 @@
-///! Various stuff for dealing with the Neon Console.
-///! Later we might move some API wrappers here.
+//! Various stuff for dealing with the Neon Console.
+//! Later we might move some API wrappers here.
 
 /// Payloads used in the console's APIs.
 pub mod messages;

proxy/src/proxy/tests.rs

@@ -1,4 +1,4 @@
-///! A group of high-level tests for connection establishing logic and auth.
+//! A group of high-level tests for connection establishing logic and auth.
 use super::*;
 use crate::{auth, sasl, scram};
 use async_trait::async_trait;