Where is a change of mind?
IS that an example of a change in doctrine?
Let me just give a few examples of change in doctrine. My background is Christianity, so others will have to fill in changes from other faiths.
God as creator → most people now believe the Earth to be older than 6,000 years, there were dinosaurs, life has existed for a long time, so creation myths and the doctrine of God as a creator has changed to more of God as "organizing" or God "inspires" but not actually creating perfect humans in a place called Eden - at least for many this doctrine has changed.
Flood - many believe this is symbolic rather than actual, or have changed beliefs about it being global.
Many have changed their interpretation of scriptures to now respect different family structures (LGBTQ), as well as changing their view on women with women now being called as leaders in the many different faith traditions. The doctrine of male being the "head of the household" has changed for many.
Racism as in large part ended for many religious groups thankfully (many Christians used to preach that the curse of Cain meant anyone without white skin was cursed etc.)
Mormons have changed doctrines of polygamy, have changed the covenants made in the temple (women no longer covenant to their husbands as being their Lord), have changed garment/underwear styles and requirements, the leaders of the Mormon church no longer write scripture or make "thus saith the Lord" statements but are much more subdued in how they communicate (not really acting like prophets anymore even though they still retain that title). Racism - the priesthood is now given to people of all nationalities (although the president and apostles of the church are still white). There are a bunch of things like Adam-God doctrine, and men living in the moon that people hide.
I guess the big ones are:
Creation myth
Flood myth
Earth standing still, etc.
Family policies (from LGBTQ, to inter-racial marriages allowed, and birth control allowed etc. the role of women)
Covenants and church membership and leader requirements
Racism beliefs and doctrines
doctrine of hell → most now see hell as figurative, or at least do not condemn children or non-Christians to hell.
That is as good a list as any to start with.