fix(spans): Fixes a broken spans snapshot (#3431)

Fixes a broken snapshot test, from
#3407, due to merging to master
without pulling latest snapshot changes.

#skip-changelog

relay-server/src/metrics_extraction/snapshots/relay_server__metrics_extraction__event__tests__extract_span_metrics_mobile.snap

@@ -487,6 +487,7 @@ expression: "(&event.value().unwrap().spans, metrics)"
                 "release": "1.2.3",
                 "sdk.name": "sentry.javascript.react-native",
                 "sdk.version": "unknown",
+                "trace.status": "unknown",
                 "transaction": "gEt /api/:version/users/",
                 "transaction.method": "GET",
                 "ttid": "ttid",