[BUG] Wrong term

[fxrysh]

In this section, the guide mentions that TypeScript is a subset of JavaScript, which is wrong. TypeScript is a superset of JavaScript.

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[fxrysh]

harmonyland.github.io/src/guide/README.md

Line 27 in 61f955a

However, it's worth considering that Harmony is made using [TypeScript](https://www.typescriptlang.org/), which is a subset of JavaScript, but strongly-typed, and we are also using **TypeScript** throughout the guide for code examples. It helps you write more concise, less error prone code, and also adds on some new features! At the end, it compiles (transpiles!) to normal JavaScript. We recommend using TypeScript for its great features and Deno's built-in TypeScript! Here are some resources,