fix 'environment' typo in android docs #972

Job	Run time
Clippy (-Zbuild-std)	1m 36s
Test (ubuntu-latest)	13s
Clippy (MSRV) (ubuntu-latest)	58s
Clippy (stable) (ubuntu-latest)	51s
Test (macos-latest)	25s
Clippy (stable) (macos-latest)	39s
Test (Android)	3m 42s
Test (windows-latest)	2m 8s
Clippy (MSRV) (macos-latest)	1m 10s
Clippy (MSRV) (windows-latest)	1m 31s
Clippy (stable) (windows-latest)	1m 40s
Test iOS (Catalyst)	20s
Test (FreeBSD)	3m 35s
Ktlint	39s
Check for documentation errors	12s
Rustfmt	4s
Check semver compatibility	14s
Verify Android artifacts	58s
	20m 55s

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