private String toYaraFormat(String hexString) {
		return hexString.replaceAll("\\.", "?").toUpperCase();
	}
Converts a hex string with '.' as wildcard characters to one that YARA understands ('?').
Also makes sure all characters are uppercase.

@param hexString
@return
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/instructionsearch/api/InstructionSearchApi_Yara.java