Update PolyfillTests_StringBuilder.cs

Author: SimonCropp

src/Tests/PolyfillTests_StringBuilder.cs

@@ -86,6 +86,7 @@ public void AppendJoin()
         Assert();
         builder.AppendJoin(',', new object[]{"value1", "value2"});
         Assert();
+        // ReSharper disable once RedundantExplicitParamsArrayCreation
         builder.AppendJoin<string>(',', ["value1", "value2"]);
         Assert();