Update readme with link to source

Signed-off-by: Nigel Jones <[email protected]>

Author: planetf1

README.md

@@ -1,6 +1,9 @@
 [//]: # (SPDX-License-Identifier: CC-BY-4.0)
-[//]: # (TODO Customize project readme)
 
-# template-code
+# Generic C Implementation f ML-KEM
+
+## Origin
+This repository is based on an original import from the **standard** branch of [pq-crystals/kyber](https://github.com/pq-crystals/kyber/tree/standard) @ [10b478fc3cc4ff6215eb0b6a11bd758bf0929cbd](https://github.com/pq-crystals/kyber/commit/d5b791c0c601b543233daccbae2845c6197a9e77). 
+
+The code implementation comes from **/ref**.
 
-Template for creating code repositories, with basic file setup included