Update doc service networking connection (#3108) (#2619)

* document updated with right API url for resource google_compute_forwarding_rule. Issue-#5598

* document updated with terraform import commands for the resource

* format wordings modified to be inline with other resources

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/3108.txt

@@ -0,0 +1,3 @@
+```release-note:REPLACEME
+
+```

website/docs/r/service_networking_connection.html.markdown

@@ -50,10 +50,9 @@ The following arguments are supported:
   this service provider. Note that invoking this method with a different range when connection
   is already established will not reallocate already provisioned service producer subnetworks.
 
-## Import
+## Import 
+ServiceNetworkingConnection can be imported using any of these accepted formats
 
-Service networking connections can be imported using the following accepted format:
+* terraform import google_service_networking_connection.peering_connection {{peering-network}}:{{service}}
 
-```
-$ terraform import google_service_networking_connection.foobar {{network}}:{{service}}
-```
+* terraform import google_service_networking_connection.peering_connection /projects/{{project}}/global/networks/{{peering-network}}:{{service}}