Fix example

Author: A-Walrus

clippy_lints/src/slice_as_bytes.rs

@@ -11,10 +11,12 @@ declare_clippy_lint! {
     /// This involves doing an unnecessary UTF-8 alignment check which is less efficient, and can cause a panic.
     /// ### Example
     /// ```rust
+    /// let s = "Lorem ipsum";
     /// s[1..5].as_bytes();
     /// ```
     /// Use instead:
     /// ```rust
+    /// let s = "Lorem ipsum";
     /// &s.as_bytes()[1..5];
     /// ```
     #[clippy::version = "1.72.0"]