[Docs] Correct a small typo (elastic#32655)

Author: simonzheng

docs/reference/setup/important-settings/node-name.asciidoc

@@ -2,7 +2,7 @@
 === `node.name`
 
 By default, Elasticsearch will use the first seven characters of the randomly
-generated UUID as the node id.Note that the node id is persisted and does
+generated UUID as the node id. Note that the node id is persisted and does
 not change when a node restarts and therefore the default node name will also
 not change.
 
@@ -19,4 +19,4 @@ The `node.name` can also be set to the server's HOSTNAME as follows:
 [source,yaml]
 --------------------------------------------------
 node.name: ${HOSTNAME}
---------------------------------------------------
+--------------------------------------------------