Update RelativeHumidityMeasurement in Matter Linux Air Quality Example README.md (#32254)

* Update Matter Linux Air Quality Example README.md

* restyled

* Update README.md

* Update README.md

* restyled
diff --git a/examples/air-quality-sensor-app/linux/README.md b/examples/air-quality-sensor-app/linux/README.md
index 651afa4..b1c2e92 100644
--- a/examples/air-quality-sensor-app/linux/README.md
+++ b/examples/air-quality-sensor-app/linux/README.md
@@ -136,10 +136,11 @@
 
 ### Trigger Humidity change event
 
-Generate event `RelativeHumidityMeasurement`, to change the temperate value.
+Generate event `RelativeHumidityMeasurement`, to change the relative humidity
+value (6000 for 60,0 %).
 
 ```
-$ echo '{"Name":"RelativeHumidityMeasurement","NewValue":60}' > /tmp/chip_air_quality_fifo_<PID>
+$ echo '{"Name":"RelativeHumidityMeasurement","NewValue":6000}' > /tmp/chip_air_quality_fifo_<PID>
 ```
 
 ### Trigger concentration change event