Update 20480C_MOD08_LAK.md

The conference location GPS coordinates (47.6097, 122.3331) incorrectly point to a location in China. The correct coordinate (47.6097, -122.3331) points to a location in Seattle.

Author: Sidney Andrews

Instructions/20480C_MOD08_LAK.md

@@ -275,7 +275,7 @@ Ensure that you have cloned the 20480C directory from GitHub (**https://github.c
     ```javascript
         const conferenceLocation = {
             latitude: 47.6097,  // decimal degrees
-            longitude: 122.3331 // decimal degrees
+            longitude: -122.3331 // decimal degrees
         };
     ```