fix: Fedora 42 build (#1126)

Fixes build error here: https://koji.fedoraproject.org/koji/taskinfo?taskID=127932100
F42 is coming, and probably there are some C++ standard library changes.
You can find the full F42 changelist here: https://fedoraproject.org/wiki/Releases/42/ChangeSet#GNU_Toolchain_Update_(gcc_15,_binutils_2.44,_glibc_2.41,_gdb_15+)

Author: gombosg

src/joyaccelerometersensor.cpp

@@ -185,7 +185,7 @@ JoySensorDirection JoyAccelerometerSensor::calculateSensorDirection()
     bool inPitch = pitch_abs < m_dead_zone;
     bool inRoll = roll_abs < range;
 
-    if (isnan(roll))
+    if (std::isnan(roll))
     {
         return SENSOR_CENTERED;
     }