🚨 fixed some clang-tidy warnings

include/nlohmann/detail/value_t.hpp

@@ -72,5 +72,5 @@ inline bool operator<(const value_t lhs, const value_t rhs) noexcept
     const auto r_index = static_cast<std::size_t>(rhs);
     return l_index < order.size() and r_index < order.size() and order[l_index] < order[r_index];
 }
-}
-}
+}  // namespace detail
+}  // namespace nlohmann