DOC: updated release.rst (GH5890)

Author: dd137

doc/source/release.rst

@@ -87,6 +87,7 @@ Bug Fixes
   - Bug when assigning to .ix[tuple(...)] (:issue:`5896`)
   - Bug in fully reindexing a Panel (:issue:`5905`)
   - Bug in idxmin/max with object dtypes (:issue:`5914`)
+  - Bug in ``BusinessDay`` when adding n days to a date not on offset when n>5 and n%5==0 (:issue:`5890`)
 
 pandas 0.13.0
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