pipeline: outputs: prometheus-remote-write: add compression

Signed-off-by: Mitsuo HEIJO <mitsuo.heijo@gmail.com>

Author: johejo

pipeline/outputs/prometheus-remote-write.md

@@ -30,6 +30,7 @@ This plugin supports the following parameters:
 | `log_response_payload` | Log the response payload within the Fluent Bit log. | `false` |
 | `add_label` | This lets you add custom labels to all metrics exposed through the Prometheus exporter. You can have multiple of these fields. | _none_ |
 | `workers` | The number of [workers](../../administration/multithreading.md#outputs) to perform flush operations for this output. | `2` |
+| `compression` | Payload compression algorithm. Supported options are `snappy`, `gzip` and `zstd`. | `snappy` |
 
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