Re-enable relay_control.cpp example test build

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
           - examples/lambda_transform.cpp
           - examples/manual_networking.cpp
           - examples/minimal_app.cpp
-          #- examples/relay_control.cpp
+          - examples/relay_control.cpp
           - examples/rpm_counter.cpp
           - examples/async_repeat_sensor.cpp
           - examples/repeat_sensor_analog_input.cpp