Fix target for DragonFly BSD #78

Job	Run time
cargo-deny (advisories)	22s
lint	25s
cargo-deny (bans licenses sources)	18s
aarch64-apple-darwin-nightly / build	53s
aarch64-apple-darwin / build	32s
aarch64-apple-ios / build	30s
aarch64-unknown-linux-gnu / build	37s
aarch64-unknown-linux-musl / build	1m 22s
arm-linux-androideabi / build	21s
armv7-linux-androideabi / build	23s
i686-pc-windows-gnu / build	1m 36s
i686-pc-windows-msvc / build	1m 43s
i686-unknown-linux-gnu / build	1m 0s
msrv-aarch64-apple-darwin / build	30s
i686-unknown-linux-musl / build	55s
msrv-arm-linux-androideabi / build	35s
msrv-x86_64-unknown-freebsd / build	32s
msrv-x86_64-pc-windows-msvc / build	47s
msrv-x86_64-unknown-linux-gnu / build	36s
msrv-x86_64-unknown-linux-musl / build	37s
msrv-x86_64-unknown-netbsd / build	30s
x86_64-pc-windows-gnu / build	1m 43s
x86_64-apple-darwin / build	44s
x86_64-pc-windows-msvc / build	1m 28s
x86_64-pc-windows-msvc-nightly / build	1m 31s
x86_64-unknown-freebsd / build	26s
x86_64-unknown-linux-gnu / build	58s
x86_64-unknown-linux-gnu-nightly / build	1m 18s
x86_64-unknown-linux-musl / build	58s
x86_64-unknown-netbsd / build	29s
	24m 39s

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