tests: Update regression tests

obalunenko · obalunenko · commit 766213208677 · 2022-01-17T18:18:09.000+03:00
diff --git a/tests/regression_test.go b/tests/regression_test.go
@@ -2361,7 +2361,7 @@ func testcases2021() []testcase {
 				Part1: "",
 				Part2: "",
 			},
-			wantErr: true,
+			wantErr: false,
 		},
 		{
 			name: "2021/day09",
