[CR] Add additional PDS4 SCRs to Release Plan

[jordanpadams]

Plan: https://app.zenhub.com/workspaces/pdsen---all-projects-5c87e859b7a0872dd10b87c5/roadmap

Added to Release Plan:

• PDS4 Information Model / LDDTool

  • CCB-319: Add 'ns' – The abbreviated unit for 'Units_of_Time' (1/10^9 s)
  • CCB-320 : Add 'W/m**2/sr/nm/(DN/s)' under Units_of_Misc
  • CCB-311: Value meanings for permissible values should be rewritten
  • CCB-264: Make the Line Feed (LF) character an allowed record delimiter
  • CCB-323: Fix schema formation rule for lidvid_reference (Part II)
  • CCB-304: Cleanup unused Vector classes in IM before 2.0.0.0

• Validate

  • CCB-264: Make the Line Feed (LF) character an allowed record delimiter

Removed from Release Plan: N/A

Rationale: Several additional SCRs passed by the CCB.

[jordanpadams]

Reviewed at February PDS SWG with no known issues from group.