arm64: Fix unexpected architecture warning

Replace `aarch` with `arm` to meet the expected architecture.

Signed-off-by: Ruoqing He <[email protected]>

Author: RuoqingHe

src/lib.rs

@@ -27,9 +27,9 @@ mod x86_64;
 #[cfg(target_arch = "x86_64")]
 pub use self::x86_64::*;
 
-#[cfg(any(target_arch = "aarch", target_arch = "aarch64"))]
+#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
 mod arm64;
-#[cfg(any(target_arch = "aarch", target_arch = "aarch64"))]
+#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
 pub use self::arm64::*;
 
 #[cfg(target_arch = "riscv64")]