GITBOOK-125: Rearrange DS connection docs

Author: Openblocks-docs

docs/SUMMARY.md

@@ -14,11 +14,11 @@
 * [Data source basics](data-sources/data-source-basics.md)
 * [Configure IP allowlists](data-sources/configure-ip-allowlists.md)
 * [Connect to databases](data-sources/connect-to-databases/README.md)
-  * [MySQL](data-sources/connect-to-databases/mysql.md)
+  * [Elasticsearch](data-sources/connect-to-databases/elasticsearch.md)
+  * [Microsoft SQL Server](data-sources/connect-to-databases/microsoft-sql-server.md)
   * [MongoDB](data-sources/connect-to-databases/mongodb.md)
+  * [MySQL](data-sources/connect-to-databases/mysql.md)
   * [PostgreSQL](data-sources/connect-to-databases/postgresql.md)
-  * [Microsoft SQL Server](data-sources/connect-to-databases/microsoft-sql-server.md)
-  * [Elasticsearch](data-sources/connect-to-databases/elasticsearch.md)
   * [Redis](data-sources/connect-to-databases/redis.md)
 * [Connect to APIs](data-sources/connect-to-databases-1/README.md)
   * [REST APIs](data-sources/connect-to-databases-1/rest-apis.md)