[Docs] Note that the fields parameter isn't required when using keep for the Remove processor (#136638)

* [Docs] Add a note that the  parameter isn't required when using

* formatting

Author: florent-leborgne

docs/reference/enrich-processor/remove-processor.md

@@ -13,9 +13,9 @@ $$$remove-options$$$
 
 | Name | Required | Default | Description |
 | --- | --- | --- | --- |
-| `field` | yes | - | Fields to be removed. Supports [template snippets](docs-content://manage-data/ingest/transform-enrich/ingest-pipelines.md#template-snippets). |
+| `field` | yes | - | Fields to be removed. Supports [template snippets](docs-content://manage-data/ingest/transform-enrich/ingest-pipelines.md#template-snippets). This parameter is not required if you use `keep` instead. |
 | `ignore_missing` | no | `false` | If `true` and `field` does not exist or is `null`, the processor quietly exits without modifying the document |
-| `keep` | no | - | Fields to be kept. When set, all fields other than those specified are removed. |
+| `keep` | no | - | Fields to keep. When set, all fields other than those specified are removed. |
 | `description` | no | - | Description of the processor. Useful for describing the purpose of the processor or its configuration. |
 | `if` | no | - | Conditionally execute the processor. See [Conditionally run a processor](docs-content://manage-data/ingest/transform-enrich/ingest-pipelines.md#conditionally-run-processor). |
 | `ignore_failure` | no | `false` | Ignore failures for the processor. See [Handling pipeline failures](docs-content://manage-data/ingest/transform-enrich/ingest-pipelines.md#handling-pipeline-failures). |