[HDRP] Fix the injection point field not visible in custom pass volumes (#6084)

* Fix custom pass injection point not visible when using the Camera mode.

* updated changelog

Author: Antoine Lelievre

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

@@ -33,6 +33,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed compatibility message not displayed correctly when switching platforms.
 - Fixed support for interleaved tiling in path tracing.
 - Fixed robustness issues with the stacklit material in path tracing (case 1373971).
+- Fixed custom pass injection point not visible in the UI when using the Camera mode.
 
 ### Changed
 - Use RayTracingAccelerationStructure.CullInstances to filter Renderers and populate the acceleration structure with ray tracing instances for improved CPU performance on the main thread.

com.unity.render-pipelines.high-definition/Editor/RenderPipeline/CustomPass/CustomPassVolumeEditor.cs

@@ -170,6 +170,7 @@ void SetMode(int value)
                 if (m_SerializedPassVolume.useTargetCamera.boolValue)
                 {
                     EditorGUILayout.PropertyField(m_SerializedPassVolume.targetCamera, Styles.targetCamera);
+                    EditorGUILayout.PropertyField(m_SerializedPassVolume.injectionPoint, Styles.injectionPoint);
                 }
                 else
                 {