Fix user env typo

Author: samuelim01

services/user/.env.sample

@@ -1,6 +1,6 @@
 # User Service
 USER_SERVICE_CLOUD_URI=<cloud_uri>
-USER_SERVICE_LOACL_URI=mongodb://127.0.0.1:27017/peerprepUserServiceDB
+USER_SERVICE_LOCAL_URI=mongodb://127.0.0.1:27017/peerprepUserServiceDB
 PORT=3001
 
 # Will use cloud MongoDB Atlas database