Mark bg, ko, pt, tr as unmaintained

Author: stomar

bg/index.html

@@ -18,3 +18,5 @@ <h1>Ruby e...</h1>
   <div id="code"></div>
 
 ---
+
+{% include unmaintained.html %}

ko/index.html

@@ -19,3 +19,5 @@ <h1>루비는...</h1>
   <div id="code"></div>
 
 ---
+
+{% include unmaintained.html %}

pt/index.html

@@ -17,3 +17,5 @@ <h1>Ruby é...</h1>
   <div id="code"></div>
 
 ---
+
+{% include unmaintained.html %}

tr/index.html

@@ -17,3 +17,5 @@ <h1>Ruby...</h1>
   <div id="code"></div>
 
 ---
+
+{% include unmaintained.html %}