Add openssf best practices badge #140

Job	Run time
Audit dependencies	24s
Clippy (x86_64-unknown-linux-gnu, false, true)	46s
Format	10s
Clippy (armv7-unknown-linux-gnueabihf, true, false, -target arm-linux-gnueabihf -mcpu=generic+v7a...	23s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 5s
Clippy (x86_64-unknown-linux-musl, true, false, -target x86_64-linux-musl)	25s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 0s
Clippy (x86_64-apple-darwin, true, false, -target x86_64-macos-gnu -g)	27s
Smoke-test fuzzing targets	3m 52s
Build and test (1.66.0, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 8s
Validate man pages	12s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-musl)	59s
Smoke-test fuzzing targets (--all-features)	1m 39s
Check unused dependencies	1m 3s
Build and test (stable, macos-latest, x86_64-apple-darwin)	1m 50s
Validate configs	31s
Build and test (stable, ubuntu-latest, --all-features, x86_64-unknown-linux-gnu)	1m 1s
Build and test (1.66.0, ubuntu-latest, --all-features, x86_64-unknown-linux-gnu)	1m 11s
Build and test (stable, ubuntu-latest, --all-features, x86_64-unknown-linux-musl)	2m 52s
Build and test (stable, macos-latest, --all-features, x86_64-apple-darwin)	1m 51s
	22m 49s

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