Update readme.md

Fix broken link to azure-c-shared-utility.

readme.md

@@ -7,7 +7,7 @@ azure-umqtt-c is a general purpose library build for MQTT protocol
 ## Dependencies
 
 azure-mqtt client use the azure-c-shared-utility, which is a C library provisioning common functionality for basic tasks (like string, list manipulation, IO, etc.).
-azure-c-shared-utility is available here: <https://github.com/Azure/azure-c-shared-utility.>
+azure-c-shared-utility is available here: <https://github.com/Azure/azure-c-shared-utility>.
 azure-c-shared-utility needs to be built before building azure-mqtt-c.  
 
 ## Setup