Small formatting change to Bing Ads doc (#17471)

I was looking at this doc again and I realized that "The Bing Ads source connector supports the following streams. For more information, see the [Bing Ads API](https://docs.microsoft.com/en-us/advertising/guides/?view=bingads-13)." should go underneath ##Supported streams.

docs/integrations/sources/bing-ads.md

@@ -53,14 +53,15 @@ The Bing Ads source connector supports the following [sync modes](https://docs.a
 * [Incremental - Deduped History](https://docs.airbyte.com/understanding-airbyte/connections/incremental-deduped-history)
 
 ## Supported Streams
+The Bing Ads source connector supports the following streams. For more information, see the [Bing Ads API](https://docs.microsoft.com/en-us/advertising/guides/?view=bingads-13).
+
 ### Basic streams
 - [accounts](https://docs.microsoft.com/en-us/advertising/customer-management-service/searchaccounts?view=bingads-13)
 - [ad_groups](https://docs.microsoft.com/en-us/advertising/campaign-management-service/getadgroupsbycampaignid?view=bingads-13)
 - [ads](https://docs.microsoft.com/en-us/advertising/campaign-management-service/getadsbyadgroupid?view=bingads-13)
 - [campaigns](https://docs.microsoft.com/en-us/advertising/campaign-management-service/getcampaignsbyaccountid?view=bingads-13)
 
 ### Report Streams
-The Bing Ads source connector supports the following streams. For more information, see the [Bing Ads API](https://docs.microsoft.com/en-us/advertising/guides/?view=bingads-13).
 - [account_performance_report_hourly](https://docs.microsoft.com/en-us/advertising/reporting-service/accountperformancereportrequest?view=bingads-13)
 - [account_performance_report_daily](https://docs.microsoft.com/en-us/advertising/reporting-service/accountperformancereportrequest?view=bingads-13)
 - [account_performance_report_weekly](https://docs.microsoft.com/en-us/advertising/reporting-service/accountperformancereportrequest?view=bingads-13)