Add custom-codecs to list of bundled plugins (#5000)

Signed-off-by: Andrew Ross <andrross@amazon.com>

Author: andrross

_install-and-configure/plugins.md

@@ -247,6 +247,7 @@ The following plugins are bundled with all OpenSearch distributions except for m
 | Anomaly Detection | [opensearch-anomaly-detection](https://github.com/opensearch-project/anomaly-detection) | 1.0.0 |
 | Asynchronous Search | [opensearch-asynchronous-search](https://github.com/opensearch-project/asynchronous-search) | 1.0.0 |
 | Cross Cluster Replication | [opensearch-cross-cluster-replication](https://github.com/opensearch-project/cross-cluster-replication) | 1.1.0 |
+| Custom Codecs | [opensearch-custom-codecs](https://github.com/opensearch-project/custom-codecs) | 2.10.0 |
 | Notebooks<sup>1</sup> | [opensearch-notebooks](https://github.com/opensearch-project/dashboards-notebooks) | 1.0.0 to 1.1.0 |
 | Notifications | [notifications](https://github.com/opensearch-project/notifications) | 2.0.0
 | Reports Scheduler | [opensearch-reports-scheduler](https://github.com/opensearch-project/dashboards-reports) | 1.0.0 |