feat: add doc for --backgroundReports

Signed-off-by: Vishal Choudhary <[email protected]>

content/en/docs/installation/customization.md

@@ -361,6 +361,7 @@ The following flags can be used to control the advanced behavior of the various
 | `backgroundScan` (R) | true | Enables/disables background reporting scans. Has no effect on background reconciliation by the background controller.|
 |`backgroundScanInterval` (R) | 1h | Sets the time interval when periodic background scans for reporting take place. Supports minute durations as well (e.g., `10m`).|
 | `backgroundScanWorkers` (R) | 2 | Defines the number of internal worker threads to use when processing background scan reports. More workers means faster report processing at the cost of more resources consumed. Since the reports controller uses leader election, all reports processing will only be done by a single replica at a time. |
+| `backgroundReports` (B) | true | Enables reporting for mutate existing and generate rules. |
 | `caSecretName` (AC) | | overwrites the default secret name of the RootCA certificate. See also the related flag `tlsSecretName`.|
 | `cleanupServerPort` (C) | 9443 | Defines the port used by the cleanup server. Usually changed in tandem with `webhookServerPort`.|
 | `clientRateLimitBurst` (ABCR) | 300 | Configures the maximum burst for throttling. Uses the client default if zero. |