fix: null scanlator

app/src/main/java/ani/dantotsu/download/DownloadCompat.kt

@@ -260,7 +260,7 @@ class DownloadCompat {
                             "$mangaLink/${it.name}",
                             it.name,
                             null,
-                            null,
+                            "Unknown",
                             SChapter.create()
                         )
                         chapters.add(chapter)

app/src/main/java/ani/dantotsu/parsers/AniyomiAdapter.kt

@@ -499,7 +499,7 @@ class DynamicMangaParser(extension: MangaExtension.Installed) : MangaParser() {
             sChapter.url,
             sChapter.name,
             null,
-            sChapter.scanlator,
+            sChapter.scanlator ?: "Unknown",
             sChapter,
             sChapter.date_upload
         )

app/src/main/java/ani/dantotsu/parsers/MangaParser.kt

@@ -79,7 +79,7 @@ data class MangaChapter(
     //Self-Descriptive
     val title: String? = null,
     val description: String? = null,
-    val scanlator: String? = null,
+    val scanlator: String,
     val sChapter: SChapter,
     val date: Long? = null,
 )