Fix release date of v0.3.1

rtucek · rtucek · commit 1882f09154bb · 2017-01-06T10:01:05.000+01:00
[skip ci]
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,4 +1,4 @@
-##### Tag v0.3.1 (2017-XX-XX)
+##### Tag v0.3.1 (2017-01-06)
 
 - Rename image
 - Update badges
