Add TVOC in Linux Air Quality Example README (project-chip#32517)

* Add TVOC in Linux Air Quality Example README

Add TVOC in Linux Air Quality Example README

* Update .wordlist.txt to add 'TVOC'

Author: lboue

.github/.wordlist.txt

@@ -1440,6 +1440,7 @@ ttymxc
 ttyUSB
 TurbidityConcentrationMeasurement
 TvCasting
+TVOC
 tvOS
 TXD
 txt

examples/air-quality-sensor-app/linux/README.md

@@ -183,3 +183,10 @@ Generate event `Pm10ConcentrationMeasurement`, to change the PM10 value.
 ```
 echo '{"Name":"Pm10ConcentrationMeasurement","NewValue":10}' > /tmp/chip_air_quality_fifo_<PID>
 ```
+
+Generate event `TotalVolatileOrganicCompoundsConcentrationMeasurement`, to
+change the TVOC value.
+
+```
+$ echo '{"Name":"TotalVolatileOrganicCompoundsConcentrationMeasurement","NewValue":100}' > /tmp/chip_air_quality_fifo_<PID>
+```