correctly update chart each time updateChartData is triggered

app/src/main/java/ovh/smayzy/i2d_project_15_app/MainActivity.kt

@@ -235,8 +235,11 @@ class MainActivity : AppCompatActivity() {
         }
 
         tempChart.data = LineData(tempSet)
-        humChart.data = LineData(humSet)
+        tempChart.notifyDataSetChanged()
         tempChart.invalidate()
+
+        humChart.data = LineData(humSet)
+        humChart.notifyDataSetChanged()
         humChart.invalidate()
     }