fixed Timestamp not being set for otel log signals

Author: Chris18230

extensions/opentelemetry/runtime/src/main/java/io/quarkus/opentelemetry/runtime/logs/OpenTelemetryLogHandler.java

@@ -10,6 +10,7 @@
 
 import java.io.PrintWriter;
 import java.io.StringWriter;
+import java.time.Instant;
 import java.util.Map;
 import java.util.Optional;
 import java.util.logging.Handler;
@@ -43,6 +44,7 @@ public void publish(LogRecord record) {
         final LogRecordBuilder logRecordBuilder = openTelemetry.getLogsBridge()
                 .loggerBuilder(INSTRUMENTATION_NAME)
                 .build().logRecordBuilder()
+                .setTimestamp(Instant.now())
                 .setObservedTimestamp(record.getInstant());
 
         if (record.getLevel() != null) {