docs: outputs: s3: document ADC regions

Signed-off-by: Shelby Hagman <shelbyzh@amazon.com>

Author: ShelbyZ

pipeline/outputs/s3.md

@@ -78,7 +78,7 @@ The [Prometheus success/retry/error metrics values](../../administration/monitor
 | `port` | TCP port of the target HTTP server. | `80` |
 | `preserve_data_ordering` | When an upload request fails, the last received chunk might swap with a later chunk, resulting in data shuffling. This feature prevents shuffling by using a queue logic for uploads. | `true` |
 | `profile` | Option to specify an AWS Profile for credentials. | _none_ |
-| `region` | The AWS region of your S3 bucket. China regions (`cn-north-1`, `cn-northwest-1`) and the AWS European Sovereign Cloud region (`eusc-de-east-1`) are supported; Fluent Bit automatically uses the correct endpoint suffix (`.amazonaws.com.cn` or `.amazonaws.eu`) and no custom `endpoint` is required. | `us-east-1` |
+| `region` | The AWS region of your S3 bucket. China regions (`cn-*`), the AWS European Sovereign Cloud regions (`eusc-*`), and Amazon Dedicated Cloud regions (`us-iso-*`, `us-isob-*`, `us-isof-*`, `eu-isoe-*`) are supported; Fluent Bit automatically uses the correct endpoint suffix (`.amazonaws.com.cn`, `.amazonaws.eu`, `.c2s.ic.gov`, `.sc2s.sgov.gov`, `.csp.hci.ic.gov`, or `.cloud.adc-e.uk`) and no custom `endpoint` is required. | `us-east-1` |
 | `retry_limit` | Set the maximum number of retries for the S3 plugin's internal retry system. Unlike other output plugins, S3 manages its own buffering and retries internally. If not explicitly set, defaults to `5` to allow sufficient retries for transient S3 errors and avoid wasting partially uploaded multipart data. Accepts an integer or `no_retries` to disable retries entirely. | `5` |
 | `role_arn` | ARN of an IAM role to assume (for example, for cross account access). | _none_ |
 | `s3_key_format` | Format string for keys in S3. This option supports a UUID, strftime time formatters, a syntax for selecting parts of the Fluent log tag using a syntax inspired by the `rewrite_tag` filter. Add `$UUID` in the format string to insert a random string. Add `$INDEX` in the format string to insert an integer that increments each upload. The `$INDEX` value saves in the `store_dir`. Add `$TAG` in the format string to insert the full log tag. Add `$TAG[0]` to insert the first part of the tag in the S3 key. The tag is split into parts using the characters specified with the `s3_key_format_tag_delimiters` option. Add the extension directly after the last piece of the format string to insert a key suffix. To specify a key suffix in `use_put_object` mode, you must specify `$UUID`. See [S3 Key Format](#s3-key-format-and-tag-delimiters). Time in `s3_key` is the timestamp of the first record in the S3 file. | `/fluent-bit-logs/$TAG/%Y/%m/%d/%H/%M/%S` |