pocketbeagle: fixed trailing whitespace

pocketbeagle/ch08.rst

@@ -4,7 +4,7 @@ PocketBeagle Cape Support
 ==========================
 
 This is a placeholder for recommendations for those building their own
-PocketBeagle Cape designs. If you'd like to join the conversation 
+PocketBeagle Cape designs. If you'd like to join the conversation
 `'check out the discussion on the forum for PocketBeagle' <https://forum.beagleboard.org/t/pocketbeagle-headers/26861>`__
 
 See also PocketBeagle under `'BeagleBoard Capes' <https://git.beagleboard.org/beagleboard/capes>`__
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