Update RELEASENOTES.md (#879)

Author: Freddy Kristiansen

RELEASENOTES.md

@@ -1,6 +1,4 @@
-## Preview
-
-Note that when using the preview version of AL-Go for GitHub, we recommend you Update your AL-Go system files, as soon as possible when informed that an update is available.
+## v4.1
 
 ### New Settings
 - `templateSha`: The SHA of the version of AL-Go currently used