fix: Shared download cache (#2184)

Author: choppeh

app/src/main/java/eu/kanade/tachiyomi/data/download/anime/AnimeDownloadCache.kt

@@ -95,7 +95,7 @@ class AnimeDownloadCache(
         .stateIn(scope, SharingStarted.WhileSubscribed(), false)
 
     private val diskCacheFile: File
-        get() = File(context.cacheDir, "dl_index_cache_v3")
+        get() = File(context.cacheDir, "dl_anime_index_cache_v3")
 
     private val rootDownloadsDirMutex = Mutex()
     private var rootDownloadsDir = RootDirectory(storageManager.getDownloadsDirectory())