Update decode_json_fields.asciidoc (elastic#25056)

Co-authored-by: DeDe Morton <dede.morton@elastic.co>
Co-authored-by: Brandon Morelli <brandon.morelli@elastic.co>

libbeat/processors/actions/docs/decode_json_fields.asciidoc

@@ -23,26 +23,23 @@ processors:
 The `decode_json_fields` processor has the following configuration settings:
 
 `fields`:: The fields containing JSON strings to decode.
-`process_array`:: (Optional) A boolean that specifies whether to process
-arrays. The default is false.
-`max_depth`:: (Optional) The maximum parsing depth. A value of 1 will decode the
-JSON objects in fields indicated in `fields`, a value of 2 will also decode the
-objects embedded in the fields of these parsed documents. The default is 1.
+`process_array`:: (Optional) A Boolean value that specifies whether to process
+arrays. The default is `false`.
+`max_depth`:: (Optional) The maximum parsing depth. A value of `1`  will decode the
+JSON objects in fields indicated in `fields`, a value of `2` will also decode the
+objects embedded in the fields of these parsed documents. The default is `1`.
 `target`:: (Optional) The field under which the decoded JSON will be written. By
-default the decoded JSON object replaces the string field from which it was
+default, the decoded JSON object replaces the string field from which it was
 read. To merge the decoded JSON fields into the root of the event, specify
 `target` with an empty string (`target: ""`). Note that the `null` value (`target:`)
-is treated as if the field was not set at all.
-`overwrite_keys`:: (Optional) A boolean that specifies whether keys that already
-exist in the event are overwritten by keys from the decoded JSON object. The
-default value is false.
-`expand_keys`:: (Optional) A boolean that specifies whether keys in the decoded JSON
-should be recursively de-dotted, and expanded into a hierarchical object structure.
+is treated as if the field was not set.
+`overwrite_keys`:: (Optional) A Boolean value that specifies whether existing keys in the event are overwritten by keys from the decoded JSON object. The
+default value is `false`.
+`expand_keys`:: (Optional) A Boolean value that specifies whether keys in the decoded JSON
+should be recursively de-dotted and expanded into a hierarchical object structure.
 For example, `{"a.b.c": 123}` would be expanded into `{"a":{"b":{"c":123}}}`.
-`add_error_key`:: (Optional) If it set to true, in case of error while decoding json keys
-`error` field is going to be part of event with error message. If it set to false, there
-will not be any error in event's field. Even error occurs while decoding json keys. The
-default value is false.
-`document_id`:: (Optional) JSON key to use as the document id. If configured,
-the field will be removed from the original json document and stored in
+`add_error_key`:: (Optional) If set to `true` and an error occurs while decoding JSON keys,
+the `error` field will become a part of the event with the error message. If set to `false`, there will not be any error in the event's field. The default value is `false`.
+`document_id`:: (Optional) JSON key that's used as the document ID. If configured,
+the field will be removed from the original JSON document and stored in
 `@metadata._id`