Error in documentation example

[kochetovalexander]

This page https://amp.dev/documentation/examples/advertising-analytics/tracking_core_web_vitals/?format=websites contains an error in a code example:

<amp-analytics>
  <script type="application/json">
    {
      "requests": {
        "event": "https://amp.dev/documentation/examples/advertising-analytics/tracking_core_web_vitals/ping?user=&account=ampdev&event=${eventId}",
        "CWV_EVENT": "${event}&type=CWV"
      },
      "triggers": {
          "cls": {
            "on": "visible",
            "request": "CWV_EVENT",
            "extraUrlParams": {
              "cls": "${cumulativeLayoutShift}"
            }
          },
          "lcp": {
            "on": "visible",
            "request": "CWV_EVENT",
            "extraUrlParams": {
              "lcp": "${largestContentfulPaint}"
            }
          },
          "fid": {
            "on": "visible",
            "request": "CWV_EVENT",
            "extraUrlParams": {
              "fid": "${firstInputDelay}"
            }
          },
        }
      }
    }
  </script>
</amp-analytics>

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