pipeline: inputs: tail: fix broken link to kubernetes filter (#1443)

Signed-off-by: lecaros <lecaros@calyptia.com>

Author: lecaros

pipeline/inputs/tail.md

@@ -32,7 +32,7 @@ The plugin supports the following configuration parameters:
 | Parser | Specify the name of a parser to interpret the entry as a structured message.                                                                                                                                                                                                                                                                                                                                                                                                                             |  |
 | Key | When a message is unstructured \(no parser applied\), it's appended as a string under the key name _log_. This option allows to define an alternative name for that key.                                                                                                                                                                                                                                                                                                                                 | log |
 | Inotify_Watcher | Set to false to use file stat watcher instead of inotify.                                                                                                                                                                                                                                                                                                                                                                                                                                                | true |
-| Tag | Set a tag \(with regex-extract fields\) that will be placed on lines read. E.g. `kube.<namespace_name>.<pod_name>.<container_name>.<container_id>`. Note that "tag expansion" is supported: if the tag includes an asterisk \(\*\), that asterisk will be replaced with the absolute path of the monitored file, with slashes replaced by dots \(also see [Workflow of Tail + Kubernetes Filter](../filters/kubernetes.md#workflow-of-tail-kubernetes-filter)\).                                                                                       |  |
+| Tag | Set a tag \(with regex-extract fields\) that will be placed on lines read. E.g. `kube.<namespace_name>.<pod_name>.<container_name>.<container_id>`. Note that "tag expansion" is supported: if the tag includes an asterisk \(\*\), that asterisk will be replaced with the absolute path of the monitored file, with slashes replaced by dots \(also see [Workflow of Tail + Kubernetes Filter](../filters/kubernetes.md#workflow-of-tail--kubernetes-filter)\).                                                                                       |  |
 | Tag\_Regex | Set a regex to extract fields from the file name. E.g. `(?<pod_name>[a-z0-9](?:[-a-z0-9]*[a-z0-9])?(?:\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*)_(?<namespace_name>[^_]+)_(?<container_name>.+)-(?<container_id>[a-z0-9]{64})\.log$`                                                                                                                                                                                                                                                                                                                    |  |
 | Static\_Batch\_Size | Set the maximum number of bytes to process per iteration for the monitored static files (files that already exists upon Fluent Bit start).                                                                                                                                                                                                                                                                                                                                                               | 50M     |
 | File\_Cache\_Advise | Set the posix_fadvise in POSIX_FADV_DONTNEED mode. This will reduce the usage of the kernel file cache. This option is ignored if not running on Linux.                                                                                                                                                                                                                                                                                                                                                              | On     |