fixed typo

source/RobotAPI/components/units/RobotUnit/RobotUnitModules/RobotUnitModuleControlThread.cpp

@@ -210,11 +210,11 @@ namespace armarx
 
             rtSwitchControllerSetupChangedControllers = false;
 
-            // a missing hearbeat (if required by the config) is interpreted as emergencyStop == true
+            // a missing heartbeat (if required by the config) is interpreted as emergencyStop == true
             if (!emergencyStop && ManagementAttorneyForControlThread::HeartbeatMissing(this))
             {
                 rtSetEmergencyStopState(EmergencyStopState::eEmergencyStopActive);
-                ARMARX_RT_LOGF_ERROR("Emergency Stop was activated because hearbeat is missing!");
+                ARMARX_RT_LOGF_ERROR("Emergency Stop was activated because heartbeat is missing!");
             }
 
             // !emergencyStop && !rtIsInEmergencyStop() -> normal control flow