Update example in GattServer.md

Amanda Butler · web-flow · commit 5b8b9caf3ece · 2018-10-22T16:32:08.000-05:00
Point example to latest version.
diff --git a/docs/api/bluetooth/GattServer.md b/docs/api/bluetooth/GattServer.md
@@ -33,4 +33,4 @@ The term characteristic value update represents Characteristic Value Notificatio
 
 ### GattServer example
 
-[![View code](https://www.mbed.com/embed/?url=https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GattServer/)](https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GattServer/file/a17a79f0d8af/main.cpp)
+[![View code](https://www.mbed.com/embed/?url=https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GattServer/)](https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GattServer/file/6aa9b4b024d7/main.cpp)

Original file line number	Diff line number	Diff line change
`@@ -33,4 +33,4 @@ The term characteristic value update represents Characteristic Value Notificatio`
`33`	`33`
`34`	`34`	`### GattServer example`
`35`	`35`
`36`		`-[![View code](https://www.mbed.com/embed/?url=https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GattServer/)](https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GattServer/file/a17a79f0d8af/main.cpp)`
	`36`	`+[![View code](https://www.mbed.com/embed/?url=https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GattServer/)](https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GattServer/file/6aa9b4b024d7/main.cpp)`