Clarify that SetSize resizes the terminal buffer.

examples/is_tty.rs

@@ -1,7 +1,11 @@
-use crossterm::tty::IsTty;
-use std::io::stdin;
+use crossterm::{tty::IsTty, terminal::{size, SetSize}, execute};
+use std::io::{stdin, stdout};
 
 pub fn main() {
+    println!("{:?}", size().unwrap());
+    execute!(stdout(), SetSize(10, 10)).unwrap();
+    println!("{:?}", size().unwrap());
+
     if stdin().is_tty() {
         println!("Is TTY");
     } else {

src/terminal.rs

@@ -338,7 +338,7 @@ impl Command for Clear {
     }
 }
 
-/// A command that sets the terminal size `(columns, rows)`.
+/// A command that sets the terminal buffer size `(columns, rows)`.
 ///
 /// # Notes
 ///