Change documentation of feature flags #1765

Job	Run time
Rustfmt (stable)	15s
clippy_check (ubuntu-latest, stable)	43s
clippy_check (ubuntu-latest, nightly)	1m 16s
clippy_check (windows-latest, stable)	2m 50s
clippy_check (windows-latest, nightly)	2m 4s
Build and Test (ubuntu-latest, 1.64)	3m 35s
Build and Test (ubuntu-latest, 1.65)	4m 14s
Build and Test (ubuntu-latest, 1.70)	3m 47s
Build and Test (ubuntu-latest, stable)	6m 31s
Build and Test (ubuntu-latest, beta)	3m 36s
Build and Test (ubuntu-latest, nightly)	3m 31s
Build and Test (windows-latest, 1.64)	4m 52s
Build and Test (windows-latest, 1.65)	7m 5s
Build and Test (windows-latest, 1.70)	4m 39s
Build and Test (windows-latest, stable)	7m 52s
Build and Test (windows-latest, beta)	6m 34s
Build and Test (windows-latest, nightly)	4m 38s
Tests result	1s
	1h 8m 3s

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