Fixed #JiraBug28171 coll_time转ms

pkg/go.opentelemetry.io/otel/exporters/otlp/otlptrace/apm_exporter.go

@@ -745,7 +745,7 @@ func buildAppMapFromEvent(traceRoot *RootDataT, sd apmTraceSpan) int {
 			traceRoot.TypeFrom = attr.Value.AsString()
 		case "time.start_at":
 			mNode.StartTime, mNode.StartTimeMs = cleanNsTime(attr.Value.AsInt64())
-			traceRoot.CollTime = mNode.StartTime
+			traceRoot.CollTime = mNode.StartTimeMs
 		case "time.end_at":
 			mNode.EndTime, mNode.EndTimeMs = cleanNsTime(attr.Value.AsInt64())
 		case "time.duration":