Correct io_get_chars comment/documentation

src/input/internal.gleam

@@ -10,6 +10,6 @@ pub type NotUsed
 @external(erlang, "shell", "start_interactive")
 pub fn shell_start_interactive(options: #(atom.Atom, atom.Atom)) -> NotUsed
 
-// https://www.erlang.org/doc/apps/stdlib/io.html#get_line/1
+// https://www.erlang.org/doc/apps/stdlib/io.html#get_chars/2
 @external(erlang, "io", "get_chars")
 fn io_get_chars(prompt: String, count: Int) -> String