pipeline: output: stackdriver: change default workers to 1, as per fluent/fluent-bit#7779 (#1208)

Signed-off-by: lecaros <[email protected]>

Author: lecaros

pipeline/outputs/stackdriver.md

@@ -31,7 +31,7 @@ Before to get started with the plugin configuration, make sure to obtain the pro
 | tag\_prefix | Set the tag\_prefix used to validate the tag of logs with k8s resource type. Without this option, the tag of the log must be in format of k8s\_container\(pod/node\).\* in order to use the k8s\_container resource type. Now the tag prefix is configurable by this option \(note the ending dot\). | k8s\_container., k8s\_pod., k8s\_node. |
 | severity\_key | Specify the name of the key from the original record that contains the severity information. |  |
 | autoformat\_stackdriver\_trace | Rewrite the _trace_ field to include the projectID and format it for use with Cloud Trace. When this flag is enabled, the user can get the correct result by printing only the traceID (usually 32 characters). | false |
-| Workers | Enables dedicated thread(s) for this output. Default value is set since version 1.8.13. For previous versions is 0. | 2 |
+| Workers | Enables dedicated thread(s) for this output. | 1 |
 | custom\_k8s\_regex | Set a custom regex to extract field like pod\_name, namespace\_name, container\_name and docker\_id from the local\_resource\_id in logs. This is helpful if the value of pod or node name contains dots. | `(?<pod_name>[a-z0-9](?:[-a-z0-9]*[a-z0-9])?(?:\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*)_(?<namespace_name>[^_]+)_(?<container_name>.+)-(?<docker_id>[a-z0-9]{64})\.log$` |
 | resource_labels | An optional list of comma separated strings specifying resource labels plaintext assignments (`new=value`) and/or mappings from an original field in the log entry to a destination field (`destination=$original`). Nested fields and environment variables are also supported using the [record accessor syntax](https://docs.fluentbit.io/manual/administration/configuring-fluent-bit/classic-mode/record-accessor). If configured, *all* resource labels will be assigned using this API only, with the exception of `project_id`. See [Resource Labels](#resource-labels) for more details. | |
 | compress | Set payload compression mechanism. The only available option is `gzip`. Default = "", which means no compression.|  |