Clarify host/guest language support (bytecodealliance#1335)

This fixes the potential confusion in the wording of the README.

Before, it suggests that the languages supported by this repo are host languages, as they are named after the paragraph that speaks about host support.

It moves this section next to the guest support paragraph, to avoid any confusion.

Author: ShalokShalom

README.md

@@ -30,10 +30,13 @@ between bindings definitions.
 [component model]: https://github.com/WebAssembly/component-model
 
 The `wit-bindgen` repository is currently focused on **guest** programs which
-are those compiled to WebAssembly. Executing a component in a host is not
+are those compiled to WebAssembly.  
+Languages developed in this repository are Rust, C, Java (TeaVM
+Java), Go (TinyGo), and C#.  
+
+Executing a component in a host is not
 managed in this repository, and some options of how to do so are [described
-below][hosts]. Languages developed in this repository are Rust, C, Java (TeaVM
-Java), Go (TinyGo), and C#. If you encounter any problems feel free to [open an
+below][hosts]. If you encounter any problems feel free to [open an
 issue](https://github.com/bytecodealliance/wit-bindgen/issues/new) or chat with
 us on [Zulip][zulip].