Minor change to tar install replaces user names with usernames per ed…

…itor (#1070)

Signed-off-by: JeffH-AWS <[email protected]>

Signed-off-by: JeffH-AWS <[email protected]>
(cherry picked from commit ece0d81)

_opensearch/install/tar.md

@@ -206,7 +206,7 @@ An OpenSearch node configured by the demo security script is not suitable for a
 
 ## Step 4: Set up OpenSearch in your environment
 
-Users who do not have prior experience with OpenSearch may want a list of recommended settings in order to get started with the service. By default, OpenSearch is not bound to a network interface and cannot be reached by external hosts. Additionally, security settings are either undefined (greenfield install) or populated by default user names and passwords if you ran the security demo script by invoking `opensearch-tar-install.sh`. The following recommendations will enable a user to bind OpenSearch to a network interface, create and sign TLS certificates, and configure basic authentication.
+Users who do not have prior experience with OpenSearch may want a list of recommended settings in order to get started with the service. By default, OpenSearch is not bound to a network interface and cannot be reached by external hosts. Additionally, security settings are either undefined (greenfield install) or populated by default usernames and passwords if you ran the security demo script by invoking `opensearch-tar-install.sh`. The following recommendations will enable a user to bind OpenSearch to a network interface, create and sign TLS certificates, and configure basic authentication.
 
 The following recommended settings will allow you to: