[8.7] [DOCS] Update create_rule.asciidoc (elastic#153734) (elastic#15…

…3795)

# Backport

This will backport the following commits from `main` to `8.7`:
- [[DOCS] Update create_rule.asciidoc
(elastic#153734)](elastic#153734)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

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Soejima","email":"25199092+TomonoriSoejima@users.noreply.github.com"},"sourceCommit":{"committedDate":"2023-03-27T16:20:46Z","message":"[DOCS]
Update create_rule.asciidoc
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Update create_rule.asciidoc
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Update create_rule.asciidoc
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BACKPORT-->

Co-authored-by: Tomonori Soejima <25199092+TomonoriSoejima@users.noreply.github.com>

docs/api/alerting/create_rule.asciidoc

@@ -224,7 +224,7 @@ The API returns the following:
   "execution_status": {
     "last_execution_date": "2022-06-08T17:20:31.632Z",
     "status": "pending"
-  }
+  },
   "actions": [
     {
       "group": "threshold met",