Add issue number to the changelog entry

Author: Cindy Krafft

CHANGES.rst

@@ -5,7 +5,7 @@ Changelog
 development version
 -------------------
 
-* Fixed: An absolute number of allowed errors (``-e N`` with N >= 1, or
+* :issue:`892`: Fixed: An absolute number of allowed errors (``-e N`` with N >= 1, or
   ``max_errors=N``) is now honoured for every adapter length. Previously,
   floating-point rounding reduced the number of allowed errors by one for some
   adapter lengths: for example, ``-e 1`` allowed no errors at all for a 49 nt