Add TVOC in Linux Air Quality Example README #92441

Job	Run time
Build on Linux (fake, gcc_release, clang, simulated)	1h 25m 49s
Build on Linux (fake, gcc_release, clang, simulated)	1h 25m 49s
Build on Linux (gcc_debug)	49m 46s
Build on Linux (gcc_debug)	49m 46s
Build on Linux (python_lib)	14m 50s
Build on Linux (python_lib)	19m 41s
Build on Darwin (clang, python_lib, simulated)	59m 47s
Build on Darwin (clang, python_lib, simulated)	59m 47s
Build on Linux (coverage)	10m 0s
Build on Linux (coverage)	10m 0s
Build on Linux (python lighting-app)	5m 49s
Build on Linux (python lighting-app)	5m 49s
	7h 36m 53s

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