fix mangadex end chapter (#5456)

end chapter doesnt add "[END]" to chapter name

src/all/mangadex/build.gradle

@@ -5,7 +5,7 @@ ext {
     extName = 'MangaDex'
     pkgNameSuffix = 'all.mangadex'
     extClass = '.MangaDexFactory'
-    extVersionCode = 100
+    extVersionCode = 101
     libVersion = '1.2'
     containsNsfw = true
 }

src/all/mangadex/src/eu/kanade/tachiyomi/extension/all/mangadex/MangaDex.kt

@@ -495,7 +495,7 @@ abstract class MangaDex(
     }
 
     private fun getFinalChapter(jsonObj: JsonObject): String =
-        jsonObj.get("last_chapter").nullString?.trim() ?: ""
+        jsonObj.get("lastChapter").nullString?.trim() ?: ""
 
     private fun isOneshot(chapterJson: JsonArray, lastChapter: String): Boolean {
         val chapter =