configuration: Add missing "U"

Author: muelli

documentation/configuration.md

@@ -57,7 +57,7 @@ The `usbguard-daemon.conf` file is loaded by the USBGuard daemon after it parses
    Generate device specific rules including the "via-port" attribute.
 
  * `AuditBackend=<backend>`
-   SBGuard audit events log backend. The backend value should be one of FileAudit or LinuxAudit.
+   USBGuard audit events log backend. The backend value should be one of FileAudit or LinuxAudit.
 
  * `AuditFilePath=<filepath>`
    USBGuard audit events log file path. Required if AuditBackend is set to FileAudit.