fix bug

Author: Tsche

include/librepr/util/string/const_string.h

@@ -27,9 +27,9 @@ struct [[nodiscard]] const_string {
   [[nodiscard]] constexpr bool empty() const noexcept { return size == 0; }
 
   [[nodiscard]] constexpr char const& operator[](std::size_t Idx) const { return value[Idx]; }
-  friend constexpr auto operator==(const_string lhs, std::string_view rhs) noexcept { return rhs == lhs.data; }
+  friend constexpr auto operator==(const_string lhs, std::string_view rhs) noexcept { return rhs == lhs.value; }
 };
 
 template <std::size_t N>
 const_string(char const (&)[N]) -> const_string<N - 1>;
-}  // namespace librepr::detail
+}  // namespace librepr::detail