fontique: Fix fontconfig->opentype extra black weight map #252

Job	Run time
cargo fmt	33s
cargo clippy (windows-latest)	1m 34s
cargo check (msrv) (windows-latest)	1m 36s
cargo clippy (macos-latest)	36s
cargo clippy (android) (armv7-linux-androideabi)	54s
cargo check (msrv) (android) (armv7-linux-androideabi)	44s
cargo check (msrv) (macos-latest)	25s
cargo clippy (android) (aarch64-linux-android)	36s
cargo clippy (ubuntu-latest)	1m 2s
cargo check (msrv) (android) (aarch64-linux-android)	42s
cargo check (msrv) (ubuntu-latest)	25s
cargo clippy (android) (x86_64-linux-android)	1m 5s
cargo check (msrv) (android) (x86_64-linux-android)	34s
cargo doc (windows-latest)	55s
cargo doc (macos-latest)	21s
typos	7s
cargo test (windows-latest)	1m 8s
cargo doc (ubuntu-latest)	15s
cargo test (macos-latest)	22s
cargo test (ubuntu-latest)	18s
	14m 12s

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