add - Added missing version property (generator)

---

We've fixed a test failure by adding a missing vCard version to the generated vCards.

---

Type: add
Breaking: False
Doc Required: False
Backport Required: False
Part: 1/1

VisualCard.Extras/Misc/CardGenerator.cs

@@ -86,6 +86,7 @@ public static Card[] GenerateCards(int cards, string namePrefix = "", string nam
 
                 // Add the begin header and the name indicators
                 builder.AppendLine(VcardConstants._beginText);
+                builder.AppendLine(VcardConstants._versionSpecifier + ":2.1");
                 builder.AppendLine(VcardConstants._fullNameSpecifier + $":{firstName} {lastName}");
                 builder.AppendLine(VcardConstants._nameSpecifier + $":{lastName};{firstName}");