fix: fix inverse bool logic

…I will learn to pay closer attention to the logical state needed to continue the branch someday, but that way was not 2 days ago.

Shoko.Server/Providers/AniDB/HTTP/AnimeCreator.cs

@@ -747,7 +747,7 @@ public static bool CreateTags(List<ResponseTag> tags, SVR_AniDB_Anime anime)
                 continue;
 
             var tag = FindOrCreateTag(rawtag);
-            if (newTagIDs.Add(tag.TagID))
+            if (!newTagIDs.Add(tag.TagID))
                 continue;
 
             tagsToSave.Add(tag);