docs: update description in readme

Bjarten · web-flow · commit 6c0a92cb51cd · 2021-03-03T19:16:29.000+01:00
diff --git a/README.md b/README.md
@@ -1,2 +1,2 @@
-# practical-python-programming-for-iot
-My exercise, notes, and code for the book Practical Python Programming for IoT
+# Practical Python Programming for IoT
+My exercises, notes, and code, for the book [Practical Python Programming for IoT](https://www.amazon.com/dp/B08K3MD5Z1/). You can find the official support code for the book [here](https://github.com/PacktPublishing/Practical-Python-Programming-for-IoT).
