update changelog

Author: lukemckinstry

CHANGES.md

@@ -15,6 +15,7 @@
 #### Additions :tada:
 
 - Added support for the [EXT_mesh_primitive_restart](https://github.com/KhronosGroup/glTF/pull/2478) glTF extension. [#12764](https://github.com/CesiumGS/cesium/issues/12764)
+- Adds support for instancing a model at runtime via `ModelInstance` and `ModelInstanceCollection` classes. [#12588](https://github.com/CesiumGS/cesium/pull/12588)
 
 ## 1.132 - 2025-08-01
 
@@ -2470,7 +2471,6 @@ _This is an npm-only release to fix a publishing issue_.
     tileset.boundingSphere.center,
   );
   ```
-
   - This also fixes several issues with clipping planes not using the correct transform for tilesets with children.
 
 ### Additions :tada:
@@ -4316,7 +4316,6 @@ _This is an npm-only release to fix a publishing issue_.
                 isStopIncluded : true,
                 data : data
             });
-
     - `TimeInterval.fromIso8601` now takes a single options parameter. Code that looked like:
 
             TimeInterval.fromIso8601(intervalString, true, true, data);
@@ -4329,7 +4328,6 @@ _This is an npm-only release to fix a publishing issue_.
                 isStopIncluded : true,
                 data : data
             });
-
     - `interval.intersect(otherInterval)` -> `TimeInterval.intersect(interval, otherInterval)`
     - `interval.contains(date)` -> `TimeInterval.contains(interval, date)`