Update CHANGELOG.md for 12.8.4

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Update CHANGELOG.md for 12.8.4
d7870fec · GitLab Release Tools Bot · 93b639cf · d7870fec
Commit d7870fec authored 4 years ago by GitLab Release Tools Bot
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@ entry.
  
 ## 12.8.4
  
+- No changes.
 ### Fixed (8 changes)
  
 - Fix Group Import API file upload when object storage is disabled. !25715