doc: Fix configurations for images in the doc of newrelic.

The screenshot generating mechanism doesn't work for newrelic and
causes error because its configuration file doesn't exist. This
commit fixes the configuration and re-generate the screenshots.

zerver/lib/integrations.py

@@ -746,7 +746,11 @@ DOC_SCREENSHOT_CONFIG: Dict[str, List[BaseScreenshotConfig]] = {
     "mention": [ScreenshotConfig("webfeeds.json")],
     "nagios": [BaseScreenshotConfig("service_notify.json")],
     "netlify": [ScreenshotConfig("deploy_building.json")],
-    "newrelic": [ScreenshotConfig("alert.txt", "002.png")],
+    "newrelic": [
+        ScreenshotConfig("incident_opened.json", "001.png"),
+        ScreenshotConfig("incident_acknowledged.json", "002.png"),
+        ScreenshotConfig("incident_closed.json", "003.png"),
+    ],
     "opbeat": [ScreenshotConfig("error_reopen.json")],
     "opsgenie": [ScreenshotConfig("addrecipient.json", image_name="000.png")],
     "pagerduty": [ScreenshotConfig("trigger_v2.json")],

zerver/webhooks/newrelic/doc.md

@@ -20,6 +20,6 @@ New Relic can send messages to a Zulip stream for incidents.
 
 {!congrats.md!}
 
-![](/static/images/integrations/newrelic/opened.png)
-![](/static/images/integrations/newrelic/ack.png)
-![](/static/images/integrations/newrelic/closed.png)
+![](/static/images/integrations/newrelic/001.png)
+![](/static/images/integrations/newrelic/002.png)
+![](/static/images/integrations/newrelic/003.png)