Docs: run the api-extractor on master to update docs (#23726)

* regenerated packages docs.

* fixed spelling issues.

* fixed spelling issues.

docs/sources/packages_api/runtime/getbackendsrv.md

@@ -12,6 +12,8 @@ draft = true
 
 ### getBackendSrv variable
 
+Used to retrieve the [BackendSrv](./runtime/backendsrv.md) that can be used to communicate via http(s) to a remote backend such as the Grafana backend, a datasource etc.
+
 <b>Signature</b>
 
 ```typescript