Changelog update

CHANGELOG.md

@@ -24,10 +24,14 @@ library (later, with Python bindings as well).
 * Internal error reports now show a relative path of source location instead of an absolute one.
 * Documentation directory `doc/` renamed to `docs/` (needed for GitHub to recognize
   [contributing.md](docs/contributing.md)).
+* *Distance* definition is now generalized to *distance vector* in [binning types](docs/observables.md#binning-types).
 
 ### Added
 
 * Global/local switch for [class `bond_order`](docs/observables.md#class-bond_order).
+* [Class `s220`](docs/observables.md#class-s220) and [class `s221`](docs/observables.md#class-s221) correlation
+  functions.
+* New [class `linear`](docs/observables.md#class-linear) binning type.
 
 
 ## [1.1.0] - 2023-06-21
@@ -53,7 +57,7 @@ This is the initial stable release of the simulation software.
 
 During the development stage (0.x versions) no changelog was maintained. The changes can be inferred from git history.
 
-[Unreleased]: https://github.com/PKua007/rampack/compare/latest..dev-1.2.0
+[Unreleased]: https://github.com/PKua007/rampack/compare/latest..dev-minor
 [latest]: https://github.com/PKua007/rampack/releases/tag/latest
 [v1]: https://github.com/PKua007/rampack/releases/tag/v1
 [1.1.0]: https://github.com/PKua007/rampack/releases/tag/v1.0.0