Conform the tutorial to WIT's semicolon specification

[NewGyu]

Hello team, I am one of those who are excited by WASM evolutions.

I tried the following tutorial, but some errors were ocurred.
https://component-model.bytecodealliance.org/tutorial.html

Then it turns out that the cause is due to these change in WIT specs.

• Use semicolons as delimiters in WIT text format WebAssembly/component-model#249
• Require semicolons after package too WebAssembly/component-model#257

I'd like to share some modifications to run the tutorial with [email protected].

$ cargo component --version
cargo-component-component 0.5.0 (wasi:6f0da84)
$ wasmtime --version
wasmtime-cli 15.0.1

Thank you.

[kate-goldenring]

Looks like this was fixed in #91. Thank you for catching this!