Collapse SolarWinds curl example to a single line

The Execute an external program alert action takes one command
line, so the ^ continuations were unnecessary.

Author: claude

docs/configuration/exporting/send-events/solarwinds.rst

@@ -21,15 +21,11 @@ Webhook URL
 Configure SolarWinds
 --------------------
 
-SolarWinds does not ship a native bearer-token webhook action. Use the **Execute an external program** action with ``curl``:
+SolarWinds does not ship a native bearer-token webhook action. Use the **Execute an external program** alert action to invoke ``curl`` (bundled with Windows 10+ and Windows Server 2019+):
 
 .. code-block::
 
-    curl -sS -X POST ^
-      -H "Authorization: Bearer <ROBUSTA_API_KEY>" ^
-      -H "Content-Type: application/json" ^
-      --data "{ \"alertName\": \"${N=Alerting;M=AlertName}\", \"node\": \"${N=SwisEntity;M=Caption}\", \"severity\": \"${N=Alerting;M=Severity}\", \"message\": \"${N=Alerting;M=AlertMessage}\" }" ^
-      "https://api.robusta.dev/webhooks?type=alert&origin=solarwinds&account_id=<ACCOUNT_ID>"
+    curl -sS -X POST -H "Authorization: Bearer <ROBUSTA_API_KEY>" -H "Content-Type: application/json" --data "{ \"alertName\": \"${N=Alerting;M=AlertName}\", \"node\": \"${N=SwisEntity;M=Caption}\", \"severity\": \"${N=Alerting;M=Severity}\", \"message\": \"${N=Alerting;M=AlertMessage}\" }" "https://api.robusta.dev/webhooks?type=alert&origin=solarwinds&account_id=<ACCOUNT_ID>"
 
 Save the action and attach it to the alerts you want forwarded.