Tweak docs

Author: microbit-grace

docs/index.md

@@ -18,6 +18,8 @@ Create Universal Hex files for the micro:bit.
   library.
 - [The micro:bit Tech Site](https://tech.microbit.org) contains general technical information about the
   micro:bit.
+- [Universal Hex Creator demo](./examples/webtool.html)
+- [Universal Hex Splitter demo](./examples/separate.html)
 
 ---
 

docs/quick-guide.md

@@ -32,6 +32,8 @@ const universalHex = microbitUh.createUniversalHex([
 ]);
 ```
 
+See [Universal Hex Creator demo](./examples/webtool.html) for example.
+
 Separate a Universal Hex into its Intel Hex strings, use {@link separateUniversalHex}
 
 ```js
@@ -45,3 +47,5 @@ if (microbitUh.isUniversalHex(intelHexStr)) {
   });
 }
 ```
+
+See [Universal Hex Splitter demo](./examples/separate.html) for example.