message: Fix duplicate CHANGES.md sections.
diff: ### ? - ?
  -##### Additions :tada:
  -
  -- Improved the Cesium ion token management. Instead of automatically creating a Cesium ion token for each project, Cesium for Unreal now prompts you to select or create a token the first time one is needed.
  -- Added a Cesium ion Token Troubleshooting panel that appears when there is a problem connecting to Cesium ion tilesets and raster overlays.
  -
  ##### Breaking Changes :mega:
  - The following Blueprints and C++ functions on `CesiumSunSky` have been renamed. CoreRedirects have been provided to handle the renames automatically for Blueprints.
  ##### Additions :tada:
  - Added Cesium Cartographic Polygon to the Cesium Quick Add panel.
  +- Improved the Cesium ion token management. Instead of automatically creating a Cesium ion token for each project, Cesium for Unreal now prompts you to select or create a token the first time one is needed.
  +- Added a Cesium ion Token Troubleshooting panel that appears when there is a problem connecting to Cesium ion tilesets and raster overlays.
  ##### Fixes :wrench
  