Update change log for the maps-v1.5.1 release

Author: Juha Alanen

CHANGELOG.md

@@ -2,6 +2,18 @@
 
 ## master
 
+## maps-v1.5.1
+
+### 🐞 Bug fixes
+
+- [core] Fix assert in gfx resources cleanup ([#16349](https://github.com/mapbox/mapbox-gl-native/pull/16349))
+
+  Fix a resource leak assertion in `gl::Context::~Context()` that is evaluating false in scenarios where graphics context has been marked as lost.
+
+- Hillshade bucket fix for mapbox-gl-native-ios #240 ([#16362](https://github.com/mapbox/mapbox-gl-native/pull/16362))
+
+  When dem tiles are loaded, border in neighboring tiles is updated, too leading to bucket re-upload. if std::move moved indices / vertices previously, they are empty and we get crash. Re-upload requires that only DEM texture is re-uploaded, not the quad vertices and indices.
+
 ## maps-v1.5.0
 
 ### ✨ New features