Changelog: next is 4.1

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
diff --git a/Changelog b/Changelog
index 5ce1233..36c00b4 100644
--- a/Changelog
+++ b/Changelog
@@ -1,7 +1,7 @@
 Entries are sorted chronologically from oldest to youngest within each release,
 releases are sorted from youngest to oldest.
 
-version <next>:
+version 4.1:
 - deblock filter
 - tmix filter
 - amplify filter