fix(docs): typo

Author: wrussell1999

content/docs/05.concepts/08.backfill.md

@@ -57,7 +57,7 @@ You can pause and resume the backfill process at any time, and by clicking on th
 You can invoke the backfill exections using the `cURL` call as follows:
 
 ```sh
-curl -XPUT http://localhost:8080/api/v1/triggers -H 'Content-Type: application/json' -d '{
+curl -X PUT http://localhost:8080/api/v1/triggers -H 'Content-Type: application/json' -d '{
   "backfill": {
     "start": "2024-03-28T06:30:00.000Z",
     "end": null,