corrected pointer repeating

Signed-off-by: Steve Springett <[email protected]>

Author: stevespringett

schema/bom-1.7.proto

@@ -2400,7 +2400,7 @@ message Citation {
   // Optional unique identifier for the citation
   optional string bom_ref = 1;
   // Field reference using JSON Pointer format
-  string pointer = 2;
+  repeated string pointer = 2;
   // Timestamp when the citation occurred
   google.protobuf.Timestamp timestamp = 3;
   // The entity (component, service, org, or person) that supplied the data (optional)