Incorrect section character in several Screening enumerations

[cdmgtri]

Four enumerations in scr:ChargeCategoryCodeSimpleType have a question mark where a section character is expected.

Example:

18 U.S.C. ? 758 should likely be 18 U.S.C. § 758 or 18 U.S.C. 758.

See related enumerations below:

Code	Definition
72	** CONVICTED UNDER 18 U.S.C. 1546
316	CONVICTION OF 18 U.S.C. 1546 (VISA FRAUD)
507	HIGH SPEED FLIGHT CONVICTION, 18 U.S.C. ? 758
520	FRAUD AND MISUSE OF VISAS, PERMITS AND OTHER DOCUMENTS: CONVICTED UNDER 18 U.S.C. ? 1546
967	HIGH SPEED FLIGHT CONVICTION, 18 U.S.C. ? 758
980	FRAUD AND MISUSE OF VISAS, PERMITS AND OTHER DOCUMENTS: CONVICTED UNDER 18 U.S.C. ? 1546

[cdmgtri]

Migrated to niemopen/niem-model#16