cu12 table fix

Author: DaniBunny

docs/big-data-cluster/release-notes-cumulative-update-12.md

@@ -23,7 +23,7 @@ SQL Server Big Data Clusters CU12 was tested on the following environment combin
 
 | Container OS | Kubernetes API | Runtime | Data Storage | Log Storage |
 | ------------ | ------- | ------- | ------------ | ----------- |
-| CU12 | Ubuntu 20.04 LTS | 1.20 | containerd 1.4.3<br/>docker 20.10.2<br/>CRI-O 1.20.0 | Block only | Block only |
+| Ubuntu 20.04 LTS | 1.20 | containerd 1.4.3<br/>docker 20.10.2<br/>CRI-O 1.20.0 | Block only | Block only |
 
 Reference Architecture White Papers for SQL Server Big Data Clusters can be found on the following pages: