Fixed URL

Author: paulzim

labs/coding-102-rest-python-ga/1.md

@@ -18,7 +18,7 @@ Completion Time: 35 minutes
 
 **Access to an APIC-EM Controller**
 * To run these code samples, you will need access to an APIC-EM controller.
-* **If you are not using your own APIC-EM Controller**, use the [DevNet Sandbox](https://developer.cisco.com/site/devnet/sandbox/) Always-On APIC-EM Lab: ![https://devnetapi.cisco.com/sandbox/apic_em]().
+* **If you are not using your own APIC-EM Controller**, use the [DevNet Sandbox](https://developer.cisco.com/site/devnet/sandbox/) Always-On APIC-EM Lab: https://sandboxapicem.cisco.com .
 
 **Python**
 * To run the code samples, you need to have Python 3 installed on your machine.