Fix comment namespace typos

Author: jagerman

include/pybind11/detail/init.h

@@ -299,7 +299,7 @@ template <typename Func> using functype =
     conditional_t<is_function_pointer<remove_reference_t<Func>>::value, remove_reference_t<Func>,
     Func>>;
 
-// Helper definition to infer the detail::init::factory template types from a callable object
+// Helper definition to infer the detail::initimpl::factory template types from a callable object
 template <typename Func, typename Return, typename... Args>
 factory<functype<Func>, Return, void, void, Args...> func_decltype(Return (*)(Args...));
 
@@ -323,7 +323,7 @@ template <typename CFunc, typename AFunc,
 factory<functype<CFunc>, CReturn, functype<AFunc>, AReturn, CArgs...> func_decltype(
     CReturn (*)(CArgs...), AReturn (*)(AArgs...));
 
-// Resolves to the appropriate specialization of the `pybind11::detail::init::factory<...>` for a
+// Resolves to the appropriate specialization of the `pybind11::detail::initimpl::factory<...>` for a
 // given init function or pair of class/alias init functions.
 template <typename... Func> using factory_t = decltype(func_decltype<Func...>(
     (function_signature_t<Func> *) nullptr...));