add templated dd_url to synthetics intake endpoints

Author: gml3ff

content/en/agent/guide/network.md

@@ -35,9 +35,9 @@ further_reading:
  - `gcp-encrypted-intake.logs.`{{< region-param key="dd_site" code="true" >}}
  - `http-encrypted-intake.logs.`{{< region-param key="dd_site" code="true" >}}
  - [Synthetics private location][11] workers rely on the endpoints below to submit test results:
- - `intake.synthetics.datadoghq.com` for sending API test results from worker versions >0.1.6. For worker versions >=1.5.0 this is the only endpoint you need to configure. 
- - `intake-v2.synthetics.datadoghq.com` for sending browser test results for worker versions >0.2.0
- - `api.datadoghq.com` for sending API test results from older worker versions <0.1.5
+ - `intake.synthetics.`{{< region-param key="dd_site" code="true" >}} for sending API test results from worker versions >0.1.6. For worker versions >=1.5.0 this is the only endpoint you need to configure. 
+ - `intake-v2.synthetics.`{{< region-param key="dd_site" code="true" >}} for sending browser test results for worker versions >0.2.0
+ - `api.`{{< region-param key="dd_site" code="true" >}} for sending API test results from older worker versions <0.1.5
 
  - All other Agent data:
  - **Agents < 5.2.0** `app.`{{< region-param key="dd_site" code="true" >}}