update readme with demo link

Author: techboy-coder

README.md

@@ -4,6 +4,7 @@
 
 `type-diff` is a library to diff two strings, useful for showing for typing games (like [monkeytype](https://monkeytype.com/)) or for showing differences between two strings. It is a simple library that is easy to use and has no dependencies. It is also very fast and lightweight.
 
+Check out a demo at [typer-diff.shivi.io](https://typer-diff.shivi.io/).
 ## Usage
 
 **Usage:**

apps/docs/README.md

@@ -8,4 +8,4 @@
 
 This is a simple Next.js app that uses the `typer-diff` library to show an input field where you can type and see the diff between the original text and the typed text. (Similar to typing games like [monkeytype](https://monkeytype.com/)).
 
-Check out the [demo](https://typer-diff.vercel.app/).
+Check out a demo at [typer-diff.shivi.io](https://typer-diff.shivi.io/).

packages/typer-diff/README.md

@@ -4,6 +4,8 @@
 
 `type-diff` is a library to diff two strings, useful for showing for typing games (like [monkeytype](https://monkeytype.com/)) or for showing differences between two strings. It is a simple library that is easy to use and has no dependencies. It is also very fast and lightweight.
 
+Check out a demo at [typer-diff.shivi.io](https://typer-diff.shivi.io/).
+
 ## Usage
 
 **Usage:**