Merge pull request #4936 from crobibero/series-start-item-id

Fix inverted SkipWhile

(cherry picked from commit 841996c642)
Signed-off-by: Joshua M. Boniface <joshua@boniface.me>

Jellyfin.Api/Controllers/TvShowsController.cs

@@ -267,7 +267,7 @@ namespace Jellyfin.Api.Controllers
             if (startItemId.HasValue)
             {
                 episodes = episodes
-                    .SkipWhile(i => startItemId.Value.Equals(i.Id))
+                    .SkipWhile(i => !startItemId.Value.Equals(i.Id))
                     .ToList();
             }