Restored sky lighting override mask

ScriptableRenderPipeline/HDRenderPipeline/HDRP/HDRenderPipelineAsset.asset

       skyReflectionSize: 256
       skyLightingOverrideLayerMask:
         serializedVersion: 2
-        m_Bits: 0
+        m_Bits: 256
     shadowInitParams:
       shadowAtlasWidth: 4096
       shadowAtlasHeight: 4096