Hegel says, the world is changing, what’s ‘change’ he means?
i feel so many things don’t change or maybe never change.
What are some examples? What doesn’t change in your mind?
whoa, deja vu. 
There will always be transient things of some description, transience itself. That the ingredients within that always change is a necessary function of that ~ and such principles shall always be. In fact don’t absolutely all principles and ideas exist forever ~ not being ‘things’ n all that?
If not there will always be nothing/emptiness and transience never occurred.
[something like, history cannot have existed when we go to the end of things]
water does not change , H2o is h2o , h2o
no other chemical combination can produce the liquid we call water
Human nature, our emotions, our instincts.
I think these do change over time. Not entirely, and not quickly, but they do shift directions and emphasis, quality, as time goes on - as human societies and ideas evolve. We are the products of this prior human sphere, context, and it is always moving across time/history. Change might take a long time to penetrate down into a really vital area, sure - but small changes do accumulate with sufficient time. Also, certain rare moments or particularly powerful ideas can in a short time lead to significant changes in certain aspects of human nature/emotions/instincts - look at the dynamic effects of Christianity, for instance.
Have we been this way since the dawn of time, then?
Yes?