[MM-64501] Upgrade to web-vitals v5.0.3 (#31404)

webapp/channels/package.json

@@ -94,7 +94,7 @@
     "timezones.json": "1.7.1",
     "tinycolor2": "1.6.0",
     "turndown": "7.2.0",
-    "web-vitals": "4.2.4",
+    "web-vitals": "5.0.3",
     "zen-observable": "0.10.0"
   },
   "devDependencies": {

webapp/channels/src/utils/performance_telemetry/reporter.ts

@@ -247,7 +247,7 @@ export default class PerformanceReporter {
         let labels: Record<string, string> | undefined;
 
         if (isLCPMetric(metric)) {
-            const selector = metric.attribution?.element;
+            const selector = metric.attribution?.target;
             const element = selector ? document.querySelector(selector) : null;
 
             if (element) {