FIX: increase chunk size to fetch title tag correctly (#14144)

lib/retrieve_title.rb

@@ -11,6 +11,9 @@ module RetrieveTitle
 
   def self.extract_title(html, encoding = nil)
     title = nil
+    if html =~ /<title>/ && html !~ /<\/title>/
+      return nil
+    end
     if doc = Nokogiri::HTML5(html, nil, encoding)
 
       title = doc.at('title')&.inner_text
@@ -44,8 +47,8 @@ module RetrieveTitle
     return 500 if uri.host =~ /amazon\.(com|ca|co\.uk|es|fr|de|it|com\.au|com\.br|cn|in|co\.jp|com\.mx)$/
     return 300 if uri.host =~ /youtube\.com$/ || uri.host =~ /youtu.be/
 
-    # default is 10k
-    10
+    # default is 20k
+    20
   end
 
   # Fetch the beginning of a HTML document at a url