Unify and fix `CHANGELOG` format (or discuss why they should be not)

[carpawell]

"NEOFS" part has its own format (node, gates), neo-go has a different one. I think none of them is bad but they are just different.

A new one CHANGELOG was born recently -- SDK. I think it is more like "NEOFS" thing, not a neo-go one but CHANGELOG adopted the neo-go way.

IMO, the same format allows having a better contributing/user experience. But if neo-go has its own and somebody has gotten used to it let it be like that. "NEOFS" repos use a well-known format (a little bit extended).

NOTE: the more that issue is being ignored, the harder its solution applies to SDK (I do not think changing the format is a good thing, let it be done once at the beginning step).

I think any issue solution should be documented in that repo.

[roman-khimov]

1. Changing old logs makes zero sense
2. Unification can be discussed
3. "a little bit extended" --- yeah, that's the problem, you can't really refer to this format since it's not compliant

[carpawell]

1. Don't mind.
2. I am not a warrior who wants all to be the same. Just SDK sounds more like neofs not neo-go to me.
3. Well, we only added Updated for deps and Updating from sections as I remember.

you can't really refer to this format since it's not compliant

Can I if we describe our format here?

[roman-khimov]

Can I if we describe our format here?

Sure.