chore: Update README.md, fix typo(s) (electron-userland#8684)

Author: Bob Conan

README.md

@@ -163,7 +163,7 @@ For an app that will be shipped to production, you should sign your application.
 ## Programmatic Usage
 See `node_modules/electron-builder/out/index.d.ts`. Typings for TypeScript are provided and also can be found [here](./electron-builder.md).
 
-Code snippit provided below is also shown "in action" [here](./programmatic-usage.md) as well.
+Code snippet provided below is also shown "in action" [here](./programmatic-usage.md) as well.
 ```js
 "use strict"