link in to reference docs for sub-clients (Azure#11396)

Author: bryevdv

sdk/search/azure-search-documents/README.md

@@ -99,11 +99,12 @@ source to extract and load data into an index.
 
 There are several types of operations that can be executed against the service:
 
--   [Index management operations](https://docs.microsoft.com/en-us/rest/api/searchservice/index-operations). Create, delete, update, or configure a search index.
--   [Document operations](https://docs.microsoft.com/en-us/rest/api/searchservice/document-operations). Add, update, or delete documents in the index, query the index, or look up specific documents by ID.
--   [Indexer operations](https://docs.microsoft.com/en-us/rest/api/searchservice/indexer-operations). Automate aspects of an indexing operation by configuring a data source and an indexer that you can schedule or run on demand. This feature is supported for a limited number of data source types.
--   [Skillset operations](https://docs.microsoft.com/en-us/rest/api/searchservice/skillset-operations). Part of a cognitive search workload, a skillset defines a series of a series of enrichment processing steps. A skillset is consumed by an indexer.
--   [Synonym map operations](https://docs.microsoft.com/en-us/rest/api/searchservice/synonym-map-operations). A synonym map is a service-level resource that contains user-defined synonyms. This resource is maintained independently from search indexes. Once uploaded, you can point any searchable field to the synonym map (one per field).
+- **Index management operations** Create, delete, update, or configure a search index. ([API Reference](https://azuresdkdocs.blob.core.windows.net/$web/python/azure-search-documents/latest/azure.search.documents.html#azure.search.documents.SearchIndexesClient), [Service Docs](https://docs.microsoft.com/en-us/rest/api/searchservice/index-operations))
+-   **Document operations** Add, update, or delete documents in the index, query the index, or look up specific documents by ID. ([API Reference](https://azuresdkdocs.blob.core.windows.net/$web/python/azure-search-documents/latest/azure.search.documents.html#azure.search.documents.SearchClient), [Service Docs](https://docs.microsoft.com/en-us/rest/api/searchservice/document-operations))
+- **Datasource operations** Create, delete, update, or configure data sources for Search Indexers ([API Reference](https://azuresdkdocs.blob.core.windows.net/$web/python/azure-search-documents/latest/azure.search.documents.html#azure.search.documents.SearchDataSourcesClient), [Service Docs](https://docs.microsoft.com/en-us/rest/api/searchservice/indexer-operations))
+- **Indexer operations** Automate aspects of an indexing operation by configuring a data source and an indexer that you can schedule or run on demand. This feature is supported for a limited number of data source types. ([API Reference](https://azuresdkdocs.blob.core.windows.net/$web/python/azure-search-documents/latest/azure.search.documents.html#azure.search.documents.SearchIndexersClient), [Service Docs](https://docs.microsoft.com/en-us/rest/api/searchservice/indexer-operations))
+- **Skillset operations** Part of a cognitive search workload, a skillset defines a series of a series of enrichment processing steps. A skillset is consumed by an indexer. ([API Reference](https://azuresdkdocs.blob.core.windows.net/$web/python/azure-search-documents/latest/azure.search.documents.html#azure.search.documents.SearchSkillsetsClient), [Service Docs](https://docs.microsoft.com/en-us/rest/api/searchservice/skillset-operations))
+- **Synonym map operations** A synonym map is a service-level resource that contains user-defined synonyms. This resource is maintained independently from search indexes. Once uploaded, you can point any searchable field to the synonym map (one per field). ([API Reference](https://azuresdkdocs.blob.core.windows.net/$web/python/azure-search-documents/latest/azure.search.documents.html#azure.search.documents.SearchSynonymMapsClient), [Service Docs](https://docs.microsoft.com/en-us/rest/api/searchservice/synonym-map-operations))
 
 ## Examples