message: docs: fix runtime key names in fault filter
diff: @@ -127,22 +127,22 @@ Runtime
  The HTTP fault injection filter supports the following global runtime settings:
  -http.fault.abort.abort_percent
  +fault.http.abort.abort_percent
  % of requests that will be aborted if the headers match. Defaults to the
  *abort_percent* specified in config. If the config does not contain an
  *abort* block, then *abort_percent* defaults to 0.
  -http.fault.abort.http_status
  +fault.http.abort.http_status
  HTTP status code that will be used as the of requests that will be
  aborted if the headers match. Defaults to the HTTP status code specified
  in the config. If the config does not contain an *abort* block, then
  *http_status* defaults to 0.
  -http.fault.delay.fixed_delay_percent
  +fault.http.delay.fixed_delay_percent
  % of requests that will be delayed if the headers match. Defaults to the
  *delay_percent* specified in the config or 0 otherwise.
  -http.fault.delay.fixed_duration_ms
  +fault.http.delay.fixed_duration_ms
  The delay duration in milliseconds. If not specified, the
  *fixed_duration_ms* specified in the config will be used. If this field
  is missing from both the runtime and the config, no delays will be
  @@ -151,10 +151,10 @@ http.fault.delay.fixed_duration_ms
  *Note*, fault filter runtime settings for the specific downstream cluster
  override the default ones if present. The following are downstream specific
  runtime keys:
  -* http.fault.<downstream-cluster>.abort.abort_percent
  -* http.fault.<downstream-cluster>.abort.http_status
  -* http.fault.<downstream-cluster>.delay.fixed_delay_percent
  -* http.fault.<downstream-cluster>.delay.fixed_duration_ms
  +* fault.http.<downstream-cluster>.abort.abort_percent
  +* fault.http.<downstream-cluster>.abort.http_status
  +* fault.http.<downstream-cluster>.delay.fixed_delay_percent
  +* fault.http.<downstream-cluster>.delay.fixed_duration_ms
  Downstream cluster name is taken from
  :ref:`the HTTP x-envoy-downstream-service-cluster <config_http_conn_man_headers_downstream-service-cluster>`
  header. If the following settings are not found in the runtime it defaults to the global runtime settings
  