Fix misleading doc header

Signed-off-by: trivernis <trivernis@protonmail.com>

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "aur-rpc"
-version = "0.1.0"
+version = "0.1.1"
 edition = "2021"
 description = "An async wrapper for aur RPC calls"
 authors = ["trivernis <trivernis@pm.me>"]

src/lib.rs

@@ -2,7 +2,7 @@
 //! This crate offers abstractions over the rpcs provided by the
 //! Arch Linux User Repository (AUR).
 //!
-//! ## Retrieving user information
+//! ## Usage
 //! ```rust
 //! #[tokio::main]
 //! pub async fn main() {