Address PR feedback - replace few es occurrences left

Signed-off-by: Yury Fridlyand <[email protected]>

Author: Yury-Fridlyand

tests/Tests/high-level.asciidoc

@@ -4,7 +4,7 @@
 = NEST - High level client
 
 The high level client, `OpenSearchClient`, provides a strongly typed query DSL that 
-maps one-to-one with the {opensearch} query DSL. Please refer to <<es-nest>> for 
+maps one-to-one with the {opensearch} query DSL. Please refer to <<opensearch-nest>> for
 installation details.
 
 NEST internally uses and still exposes the low level client, 

tests/Tests/installation.asciidoc

@@ -4,7 +4,7 @@
 This page is about about how to install the `OpenSearch.Net` and the `NEST`
 clients.
 
-[[es-net]]
+[[opensearch-net]]
 [discrete]
 === Installing the OpenSearch.Net client
 
@@ -24,7 +24,7 @@ Or by searching for
 https://www.nuget.org/packages/OpenSearch.Net[OpenSearch.Net] in the 
 Package Manager GUI.
 
-[[es-nest]]
+[[opensearch-nest]]
 [discrete]
 === Installing the NEST client
 

tests/Tests/low-level.asciidoc

@@ -1,14 +1,14 @@
-[[elasticsearch-net]]
+[[opensearch-net]]
 = OpenSearch.Net - Low level client
 
 The low level client, `OpenSearchLowLevelClient`, is a low level, dependency free 
 client that has no opinions about how you build and represent your requests and 
-responses. Please refer to <<es-net>> for installation details.
+responses. Please refer to <<opensearch-net>> for installation details.
 
 
 include::client-concepts/low-level/getting-started.asciidoc[]
 
-[[elasticsearch-net-conventions]]
+[[opensearch-net-conventions]]
 == Conventions
 
 The low level client has only a few conventions