Add gzip limitation

Author: PatAltimore

articles/iot-operations/connect-to-cloud/howto-configure-kafka-endpoint.md

@@ -108,7 +108,7 @@ kubectl create secret generic cs-secret -n azure-iot-operations \
 
 #### Limitations
 
-Azure Event Hubs [doesn't support all the compression types that Kafka supports](../../event-hubs/azure-event-hubs-kafka-overview.md#compression). Only GZIP compression is supported. Using other compression types might result in errors.
+Azure Event Hubs [doesn't support all the compression types that Kafka supports](../../event-hubs/azure-event-hubs-kafka-overview.md#compression). Only GZIP compression is supported in Azure Event Hubs premium and dedicated tiers currently. Using other compression types might result in errors.
 
 ### Other Kafka brokers
 
@@ -455,7 +455,7 @@ The compression field enables compression for the messages sent to Kafka topics.
 | Value | Description |
 | ----- | ----------- |
 | `None` | No compression or batching is applied. None is the default value if no compression is specified. |
-| `Gzip` | GZIP compression and batching are applied. GZIP is a general-purpose compression algorithm that offers a good balance between compression ratio and speed. GZIP is the only compression method supported by Azure Event Hubs. |
+| `Gzip` | GZIP compression and batching are applied. GZIP is a general-purpose compression algorithm that offers a good balance between compression ratio and speed. Only [GZIP compression is supported in Azure Event Hubs premium and dedicated tiers](../../event-hubs/azure-event-hubs-kafka-overview.md#compression) currently. |
 | `Snappy` | Snappy compression and batching are applied. Snappy is a fast compression algorithm that offers moderate compression ratio and speed. |
 | `Lz4` | LZ4 compression and batching are applied. LZ4 is a fast compression algorithm that offers low compression ratio and high speed. |