Fix bug some comics have no title blogtruyen (#14562)

src/vi/blogtruyen/build.gradle

@@ -5,7 +5,7 @@ ext {
     extName = 'BlogTruyen'
     pkgNameSuffix = 'vi.blogtruyen'
     extClass = '.BlogTruyen'
-    extVersionCode = 10
+    extVersionCode = 11
 }
 
 apply from: "$rootDir/common.gradle"

src/vi/blogtruyen/src/eu/kanade/tachiyomi/extension/vi/blogtruyen/BlogTruyen.kt

@@ -142,8 +142,9 @@ class BlogTruyen : ParsedHttpSource() {
 
     override fun mangaDetailsParse(document: Document): SManga {
         val infoElement = document.select("div.description").first()
-
+        val title = document.select(".entry-title").first()
         val manga = SManga.create()
+        manga.title = title.select(".entry-title a").first().text()
         manga.author = infoElement.select("p:contains(Tác giả) > a").first()?.text()
         manga.genre = infoElement.select("span.category a").joinToString { it.text() }
         manga.description = document.select("div.detail > div.content").text()