Fix rvv

Author: AntoinePrv

include/xsimd/arch/xsimd_rvv.hpp

@@ -96,8 +96,8 @@
             static constexpr size_t width = XSIMD_RVV_BITS;               \
             static constexpr size_t vl = width / (sizeof(T) * 8);         \
             using vec = rvv_reg_t<T, width>;                              \
-            using uvec = rvv_reg_t<xsimd::sized_uint_t<T>, width>;        \
-            using svec = rvv_reg_t<xsimd::sized_int_t<T>, width>;         \
+            using uvec = rvv_reg_t<xsimd::sized_uint_t<sizeof(T)>, width>;        \
+            using svec = rvv_reg_t<xsimd::sized_int_t<sizeof(T)>, width>;         \
             using fvec = rvv_reg_t<as_float_relaxed_t<T>, width>;         \
             using bvec = rvv_bool_t<T, width>;                            \
             using scalar_vec = rvv_reg_t<T, types::detail::rvv_width_m1>; \