[MD]Update MD data source documentation link (opensearch-project#2693) (

opensearch-project#2721)

Signed-off-by: Kristen Tian <tyarong@amazon.com>

Signed-off-by: Kristen Tian <tyarong@amazon.com>
(cherry picked from commit 1ecfee7)

Co-authored-by: Kristen Tian <105667444+kristenTian@users.noreply.github.com>

CHANGELOG.md

@@ -32,6 +32,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - [Vis Builder] Rename wizard on save modal and visualization table ([#2645](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2645))
 - Change save object type, wizard id and name to visBuilder #2673 ([#2673](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2673))
 - Add extension point in saved object management to register namespaces and show filter ([#2656](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2656))
+- [Multi DataSource] Update MD data source documentation link ([#2693](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2693))
 
 ### 🐛 Bug Fixes
 * [Vis Builder] Fixes auto bounds for timeseries bar chart visualization ([2401](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2401))

src/core/public/doc_links/doc_links_service.ts

@@ -403,6 +403,9 @@ export class DocLinksService {
             loadingData: `${OPENSEARCH_WEBSITE_DOCS}`,
             introduction: `${OPENSEARCH_WEBSITE_DOCS}`,
           },
+          dataSource: {
+            guide: `${OPENSEARCH_DASHBOARDS_VERSIONED_DOCS}discover/multi-data-sources/`,
+          },
           management: {
             opensearchDashboardsGeneralSettings: `${OPENSEARCH_WEBSITE_DOCS}`,
             opensearchDashboardsSearchSettings: `${OPENSEARCH_WEBSITE_DOCS}`,
@@ -759,6 +762,9 @@ export interface DocLinksStart {
         readonly loadingData: string;
         readonly introduction: string;
       };
+      readonly dataSource: {
+        readonly guide: string;
+      };
       readonly scriptedFields: {
         readonly scriptFields: string;
         readonly scriptAggs: string;

src/plugins/data_source_management/public/management_app/compoenent/experimental_callout/experimental_callout.tsx

@@ -26,7 +26,7 @@ export const ExperimentalCallout = ({ docLinks }: { docLinks: DocLinksStart }) =
               defaultMessage="This feature is experimental and should not be used in a production environment. Any index patterns, visualization, and observability panels will be impacted if the feature is deactivated. For more information see "
             />
           }
-          <EuiLink href={docLinks.links.noDocumentation.indexPatterns.introduction} target="_blank">
+          <EuiLink href={docLinks.links.noDocumentation.dataSource.guide} target="_blank">
             {
               <FormattedMessage
                 id="dataSourcesManagement.experimentalFeatureCallout.documentationText"