naming consitency (#535)

Author: chenziliang

docs/elastic-external.md

@@ -1,8 +1,8 @@
-# Elastic Search 
+# Elasticsearch 
 
 Leveraging HTTP external stream, you can write data to Elastic Search or Open Search directly from Timeplus.
 
-## Write to OpenSearch / ElasticSearch {#example-write-to-es}
+## Write to OpenSearch / Elasticsearch {#example-write-to-es}
 
 Assuming you have created an index `students` in a deployment of OpenSearch or ElasticSearch, you can create the following external stream to write data to the index.
 

docs/timeplus-external-stream-sink.mdx

@@ -1,6 +1,6 @@
 ---
 id: timeplus-sink
-title: Remote Timeplus
+title: Timeplus
 ---
 
 import ExternalTimeplusSink from './shared/timeplus-external-stream.md';

sidebars.js

@@ -167,7 +167,7 @@ const sidebars = {
         },
         {
           type: "doc",
-          label: "Remote Timeplus",
+          label: "Timeplus",
           id: "timeplus-source",
         },
         {
@@ -434,12 +434,12 @@ const sidebars = {
         },
         {
            type: "doc",
-           label: "Elastic Search",
+           label: "Elasticsearch",
            id: "elastic-external",
         },
         {
            type: "doc",
-           label: "Big Query",
+           label: "BigQuery",
            id: "bigquery-external",
         },
         {
@@ -464,7 +464,7 @@ const sidebars = {
         // },
         {
           type: "doc",
-          label: "Remote Timeplus",
+          label: "Timeplus",
           id: "timeplus-sink",
         },
         {