Fix a misspelling

Co-authored-by: Hiroki Kobayashi <3303362+koba-e964@users.noreply.github.com>

Author: qryxip

crates/input/Cargo.toml

@@ -3,7 +3,7 @@ name = "input"
 version = "0.1.0"
 authors = ["rust-lang-ja Developers"]
 edition = "2018"
-description = "Provides a `input!` macro for the `examples`."
+description = "Provides an `input!` macro for the `examples`."
 license = "CC0-1.0"
 publish = false