chore: document omnictl audit-log date range

public/omni/cluster-management/using-audit-log.mdx

@@ -33,7 +33,7 @@ The audit log is stored in the directory specified by `--audit-log-dir <dir>` fl
 There are two ways of getting a concatenated audit log using Omni:
 
 1. Using UI. Simply click "Download audit log" in the main menu from the home panel on the lower right.
-2. Using `omnictl audit-log` command. This command will stream the audit log from the Omni to the local machine stdout.
+2. Using `omnictl audit-log <start-date> <end-date>` command. This command will stream the audit log from the Omni to the local machine stdout.
 
 The second way is preferable if you have a huge audit log, as it will not consume a lot of memory on the client if you look for something specific.
 

public/omni/reference/cli.mdx

@@ -41,6 +41,12 @@ Read audit log from Omni
 omnictl audit-log [flags]
 ```
 
+Optionally specify a date range using the YYYY-MM-DD format:
+
+```
+omnictl audit-log <start-date> <end-date> [flags]
+```
+
 ### Options
 
 ```