fix couple of typos in the docs
The _cross cluster search_ feature allows any node to act as a federated client across
multiple clusters. In contrast to the _tribe_ feature, a _cross cluster search_ node won't
-join the remote cluster, instead it connects to a remote cluster in a light fashion in order to executed
+join the remote cluster, instead it connects to a remote cluster in a light fashion in order to execute
federated search requests.
The _cross cluster search_ feature works by configuring a remote cluster in the cluster state and connects only to a
limited number of nodes in the remote cluster. Each remote cluster is referenced by a name and a list of seed nodes.
Those seed nodes are used to discover other nodes eligible as so-called _gateway nodes_. Each node in a cluster that
-has remote cluster configured connects to one or more _gateway nodes_ and uses them to federate search requests to
+has remote clusters configured connects to one or more _gateway nodes_ and uses them to federate search requests to
the remote cluster.
Remote clusters can either be configured as part of the `elasticsearch.yml` file or be dynamically updated via
