Update VERSION files

[merge-train skip]

Update VERSION files
511d324e · GitLab Release Tools Bot · 8197656e · 511d324e
Commit 511d324e authored 2 years ago by GitLab Release Tools Bot
--- a/VERSION
+++ b/VERSION
-15.6.2-ee
\ No newline at end of file
+15.6.3-ee
\ No newline at end of file