Add Juraj Janecek to translators

Change-Id: I487a668e0331eacf12b048ff9933ee705bfae3eb
diff --git a/CHANGELOG.mkdn b/CHANGELOG.mkdn
index 8395d71..cde779b 100644
--- a/CHANGELOG.mkdn
+++ b/CHANGELOG.mkdn
@@ -72,6 +72,7 @@
 * Polish: Maciej Rozbicki
 * Korean: Inseok Lee
 * Traditional Chinese: Ladios Jonquil
+* Slovak: Juraj Janecek
 
 CHANGELOG
 ---------