Update README link

fix link that's currently 404

IDE/zephyr/README.md

@@ -1,3 +1,3 @@
 # Zephyr
 
-Zephyr Project Port has been moved to [wolfssl/RTOS/zephyr](../../RTOS/zephyr/README.md)
+Zephyr Project Port has been moved to [wolfssl/zephyr](https://github.com/wolfSSL/wolfssl/tree/master/zephyr)