Fix build issue

Author: j-f1

Mastodon/Scene/Onboarding/PickServer/MastodonPickServerViewModel+Diffable.swift

@@ -48,12 +48,13 @@ extension MastodonPickServerViewModel {
 
         loadIndexedServerStateMachine.enter(LoadIndexedServerState.Loading.self)
 
-        Publishers.CombineLatest(
+        Publishers.CombineLatest3(
             filteredIndexedServers,
+            selectCategoryItem,
             unindexedServers
         )
         .receive(on: DispatchQueue.main)
-        .sink(receiveValue: { [weak self] indexedServers, unindexedServers in
+        .sink(receiveValue: { [weak self] indexedServers, selectCategoryItem, unindexedServers in
             guard let self = self else { return }
             guard let diffableDataSource = self.diffableDataSource else { return }