Fix block quotes not being parsed correctly

lib/gemini.ex

@@ -103,7 +103,7 @@ defmodule Gemini do
                 {[{:list_item, String.trim(rest)} | lines], false}
 
               ">" <> rest ->
-                {[{:quoted, String.trim(rest)} | rest], false}
+                {[{:quoted, String.trim(rest)} | lines], false}
 
               line ->
                 {[{:text, line} | lines], false}