How do you handle release notes for your projects?

For those that publish release notes for their projects. 

What does your process look like? 

What tools are you using? 

What are some things that would make this process easier for you? 

Context: Thinking about building something for myself to solve for this but and want to know how others are handling this to better inform what I end up landing on to build. 

Any input is appreciated 🙏