vmbase: Fix typo in async_safe_fatal_va_list docs

Test: -
Change-Id: I7a92895e195c599da32ee3421bd25c5f514377d3
diff --git a/vmbase/src/bionic.rs b/vmbase/src/bionic.rs
index a38fd25..9fe3a4a 100644
--- a/vmbase/src/bionic.rs
+++ b/vmbase/src/bionic.rs
@@ -111,7 +111,7 @@
 ///
 /// # Note
 ///
-/// This Rust functions is missing the last argument of its C/C++ counterpart, a va_list.
+/// This Rust function is missing the last argument of its C/C++ counterpart, a va_list.
 #[no_mangle]
 unsafe extern "C" fn async_safe_fatal_va_list(prefix: *const c_char, format: *const c_char) {
     // SAFETY: The caller guaranteed that both strings were valid and NUL-terminated.