Fix typo in documentation for collections.ChainMap, thanks to Olivier Bernard from docs@
diff --git a/Misc/ACKS b/Misc/ACKS
index b137613..da7a434 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -101,6 +101,7 @@
 Michel Van den Bergh
 Julian Berman
 Brice Berna
+Olivier Bernard
 Eric Beser
 Steven Bethard
 Stephen Bevan