docs: make unbuffered_bytes docs more consistent (#15019)

changelog: None

clippy_lints/src/methods/mod.rs

@@ -4426,7 +4426,7 @@
     /// ```no_run
     /// use std::io::{BufReader, Read};
     /// use std::fs::File;
-    /// let file = BufReader::new(std::fs::File::open("./bytes.txt").unwrap());
+    /// let file = BufReader::new(File::open("./bytes.txt").unwrap());
     /// file.bytes();
     /// ```
     #[clippy::version = "1.87.0"]