spec(calendar): fix failing test

Author: simeonoff

projects/igniteui-angular/src/lib/calendar/calendar.component.spec.ts

@@ -620,14 +620,8 @@ describe("IgxCalendar - ", () => {
                     calendarRowsMar.forEach((row, idx) => {
                         const firstRowItem = row.nativeElement.children[0];
                         if (idx === 5) {
-                            // With simple counting for Sunday start, expect 13
                             expect(firstRowItem.firstChild.innerText).toEqual(
-                                "13",
-                            );
-                        }
-                        if (idx === 6) {
-                            expect(firstRowItem.firstChild.innerText).toEqual(
-                                "13",
+                                "12",
                             );
                         }
                     });