Handle file names with multiple ".cbz" occurrences properly

Fixes #8838

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

@@ -312,7 +312,7 @@ class DownloadCache(
                                         // Folder of images
                                         it.isDirectory -> it.name
                                         // CBZ files
-                                        it.isFile && it.name?.endsWith(".cbz") == true -> it.name!!.replace(".cbz", "")
+                                        it.isFile && it.name?.endsWith(".cbz") == true -> it.name!!.substringBeforeLast(".cbz")
                                         // Anything else is irrelevant
                                         else -> null
                                     }