Update reference-systemconfig.md

Author: dvir-ms

articles/sentinel/sap/reference-systemconfig.md

@@ -210,8 +210,8 @@ PAHI_FULL = <True/False>
 AGR_AGRS_FULL = <True/False>
 USRSTAMP_FULL = <True/False>
 USRSTAMP_INCREMENTAL = <True/False>
-SNCSYSACL_FULL = <True/False>
-USRACL_FULL = <True/False>
+SNCSYSACL_FULL = <True/False> (Preview)
+USRACL_FULL = <True/False> (Preview)
 ```
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