fix(raw.rs): pkg_cache_find_name_arch function signature

Removed from the function signature the parameter (arch: *const c_char)

src/raw.rs

@@ -38,7 +38,6 @@ extern "C" {
     pub fn pkg_cache_find_name_arch(
         cache: PCache,
         name: *const c_char,
-        arch: *const c_char,
     ) -> PPkgIterator;
     pub fn pkg_iter_release(iterator: PPkgIterator);