Add machine type in the artifact of Examples directory job (#18459)

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

utils/notification_service.py

@@ -448,7 +448,12 @@ class Message:
 
         content = {"type": "section", "text": {"type": "mrkdwn", "text": text}}
 
-        if job_result["job_link"] is not None:
+        # TODO: Make sure we always have a valid job link (or at least a way not to break the report sending)
+        # Currently we get the device from a job's artifact name.
+        # If a device is found, the job name should contain the device type, for example, `XXX (single-gpu)`.
+        # This could be done by adding `machine_type` in a job's `strategy`.
+        # (If `job_result["job_link"][device]` is `None`, we get an error: `... [ERROR] must provide a string ...`)
+        if job_result["job_link"] is not None and job_result["job_link"][device] is not None:
             content["accessory"] = {
                 "type": "button",
                 "text": {"type": "plain_text", "text": "GitHub Action job", "emoji": True},