Updated wording in WebGPUDemo/README.md (#32)

We should consistently refer to Swift SDK as such, to distinguish it from Xcode SDKs. Also expanded working WRT matching toolchain version.

Author: MaxDesiatov

WebGPUDemo/README.md

@@ -3,14 +3,14 @@
 Install a development snapshot and Swift SDK for Wasm by following
 https://www.swift.org/documentation/articles/wasm-getting-started.html.
 
-Build with the installed SDK using JavaScriptKit's `PackageToJSPlugin` plugin. Make sure to update
-the Swift SDK to the installed version.
+Build with the installed Swift SDK using JavaScriptKit's `PackageToJSPlugin` plugin. Make sure to update
+the Swift SDK in the following command to the version that matches your installed swift.org toolchain.
 ```
 swift package --swift-sdk swift-DEVELOPMENT-SNAPSHOT-2025-06-03-a_wasm js --use-cdn
 ```
 
-Start a HTTP server with eg. `python -m http.server` or `npx serve`. And then open
-http://localhost:8000 to view the render of Swift using WebGPU.
+Start a HTTP server with eg. `python -m http.server` or `npx serve`, then open
+http://localhost:8000 to view the Swift logo rendered using WebGPU.
 
 > [!NOTE]
 > If using an editor with SourceKit-LSP, make sure to update `.sourcekit-lsp/config.json` with the