refactor: Fix analysis warning about unused member

src/Recyclarr.Cli/Pipelines/CustomFormat/Cache/CustomFormatCacheData.cs

@@ -1,3 +1,4 @@
+using JetBrains.Annotations;
 using Recyclarr.Cli.Cache;
 
 namespace Recyclarr.Cli.Pipelines.CustomFormat.Cache;
@@ -7,5 +8,5 @@ public record TrashIdMapping(string TrashId, string CustomFormatName, int Custom
 [CacheObjectName("custom-format-cache")]
 public record CustomFormatCacheData(
     int Version,
-    string InstanceName,
+    [UsedImplicitly] string InstanceName,
     IReadOnlyCollection<TrashIdMapping> TrashIdMappings);