feat: document stdout report path (#1990)

Author: rgmz

cmd/root.go

@@ -74,7 +74,7 @@ func init() {
 	cobra.OnInitialize(initLog)
 	rootCmd.PersistentFlags().StringP("config", "c", "", configDescription)
 	rootCmd.PersistentFlags().Int("exit-code", 1, "exit code when leaks have been encountered")
-	rootCmd.PersistentFlags().StringP("report-path", "r", "", "report file")
+	rootCmd.PersistentFlags().StringP("report-path", "r", "", "report file (use \"-\" for stdout)")
 	rootCmd.PersistentFlags().StringP("report-format", "f", "", "output format (json, csv, junit, sarif, template)")
 	rootCmd.PersistentFlags().StringP("report-template", "", "", "template file used to generate the report (implies --report-format=template)")
 	rootCmd.PersistentFlags().StringP("baseline-path", "b", "", "path to baseline with issues that can be ignored")