release 3.2.0

CHANGELOG.md

@@ -3,7 +3,7 @@ way the logic is used on paper.  We also mention some significant changes in the
 Coq development, but not every API-breaking change is listed.  Changes marked
 `[#]` still need to be ported to the Iris Documentation LaTeX file(s).
 
-## Iris 3.2.0 (unreleased)
+## Iris 3.2.0 (released 2019-08-29)
 
 This release of Iris received contributions by Aleš Bizjak, Amin Timany, Dan
 Frumin, Glen Mével, Hai Dang, Hugo Herbelin, Jacques-Henri Jourdan, Jan Menz,