HDRP: Update changelog

com.unity.render-pipelines.high-definition/CHANGELOG.md

 - Fix planar reflections that were not working with tile/cluster (olbique matrix)
 - Fix debug menu at runtime not working after nested prefab PR come to trunk
 - Fix scrolling issue in density volume
+- Fix an issue where the screen where darken when rendering camera preview
+- Fix display correct target platform when showing message to inform user that a platform is not supported
+- Remove workaround for metal and vulkan in normal buffer encoding/decoding
 
 ### Changed
 - Shader code refactor: Split MaterialUtilities file in two parts BuiltinUtilities (independent of FragInputs) and MaterialUtilities (Dependent of FragInputs)