fix(test): Fixed an issue where coordination number test would fail d…

…ue to 'expectaton' being wrongly parsed on int to string (no 00 format).

Signed-off-by: Johannes Tegnér <[email protected]>

Personnummer.Tests/PersonnummerTests.cs

@@ -329,7 +329,7 @@ public void TestDateCn(PersonnummerData data)
         {
             var expect = data.LongFormat[..4];
             expect += data.LongFormat.Substring(4, 2);
-            expect += (int.Parse(data.LongFormat.Substring(6, 2)) - 60).ToString();
+            expect += (int.Parse(data.LongFormat.Substring(6, 2)) - 60).ToString("00");
 
             var pn = new Personnummer(data.LongFormat);
             Assert.Equal(expect, $"{pn.Date.Year:0000}{pn.Date.Month:00}{pn.Date.Day:00}");