Fix documentation typo

[SalzmanA]

I think there's a small typo here in the remote_indices documentation.

[schnellerhase]

Yes thanks, see

dolfinx/python/dolfinx/wrappers/dolfinx_wrappers/common.h

Lines 81 to 84 in c24c3a8

	auto _remote_data = remote_data.view();
	auto& idx = self.remote_indices();
	for (std::size_t i = 0; i < idx.size(); ++i)
	send_buffer[i] = _remote_data(idx[i]);

.