Updated link to older boards in retired tutorial

Updated link to older boards in retired tutorial

Author: jhansson-ard

content/retired/04.other/hardware-pictures/content.md

@@ -55,7 +55,7 @@ Serial Single Sided - This board is designed to be etched and assembled by hand.
 
 ## Looking for an older board?
 
-The [hardware index](content/retired/01.boards/arduino-older-boards) lists all the Arduino boards made and the differences between them.
+The [hardware index](content/retired/04.other/arduino-older-boards) lists all the Arduino boards made and the differences between them.
 
 ## Shields
 
@@ -73,4 +73,4 @@ Products from others that we've tried and liked; compatible with the Arduino sof
 
 ## Other Related Hardware
 
-Also check out the community-maintained [list of related hardware](http://www.arduino.cc/playground/Main/SimilarBoards) on the playground.
+Also check out the community-maintained [list of related hardware](http://www.arduino.cc/playground/Main/SimilarBoards) on the playground.