docs(allowlist): update DynamoDB allowlist example (#2552)

Co-authored-by: Pepe Fagoaga <pepe@verica.io>

docs/tutorials/allowlist.md

@@ -116,6 +116,9 @@ prowler aws -w arn:aws:dynamodb:<region_name>:<account_id>:table/<table_name>
     - Regions (List): This field contains a list of regions where this allowlist rule is applied (it can also contains an `*` to apply all scanned regions).
     - Resources (List): This field contains a list of regex expressions that applies to the resources that are wanted to be allowlisted.
     - Tags (List): -Optional- This field contains a list of tuples in the form of 'key=value' that applies to the resources tags that are wanted to be allowlisted.
+    - Exceptions (Map): -Optional- This field contains a map of lists of accounts/regions/resources/tags that are wanted to be excepted in the allowlist.
+
+The following example will allowlist all resources in all accounts for the EC2 checks in the regions `eu-west-1` and `us-east-1` with the tags `environment=dev` and `environment=prod`, except the resources containing the string `test` in the account `012345678912` and region `eu-west-1` with the tag `environment=prod`:
 
 <img src="../img/allowlist-row.png"/>