[cssm] updated SPDF

[Eddy, Wesley M. (GSFC-580.0)[MTI SYSTEMS, INC.]]

As mentioned in the meeting today, there is a very slightly updated SPDF book available:
https://cwe.ccsds.org/css/docs/CSS-SM/CWE%20Private/Book%20Production/Blue/Service%20Package%20Data%20Formats/White%20Book/Drafts/ServicePackageSpecification%20902.4-w0.10.docx?d=w356136b62f2d417eadf54f2b69008b32

The change in this revision is removal of the service request version, consistent with this change that was made in the CDE a couple of months ago.

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