chore: update changelog

Author: gadomski

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+- Clarified behavior of GET requests when `include` is missing ([#12](https://github.com/stac-api-extensions/fields/pull/12))
+
 ## [v1.0.0-rc.3] - 2022-03-29
 
 ### Changed
@@ -33,6 +39,7 @@ None
 Versions [v1.0.0-rc.1](https://github.com/radiantearth/stac-api-spec/tree/v1.0.0-rc.1) and
 prior can be found in the [stac-api-spec](https://github.com/radiantearth/stac-api-spec/) repo
 
+[Unreleased]: <https://github.com/stac-api-extensions/fields/compare/v1.0.0-rc.3...main>
 [v1.0.0-rc.3]: <https://github.com/stac-api-extensions/fields/tree/v1.0.0-rc.3>
 [v1.0.0-rc.2]: <https://github.com/stac-api-extensions/fields/tree/v1.0.0-rc.2>
 [v1.0.0-rc.1]: <https://github.com/radiantearth/stac-api-spec/tree/v1.0.0-rc.1>