Fix format

Signed-off-by: Soumik Sarker <ronodhirsoumik@gmail.com>

Author: ronodhirSoumik

web/src/main/java/org/springframework/security/web/server/ObservationWebFilterChainDecorator.java

@@ -26,9 +26,10 @@
 import io.micrometer.observation.ObservationConvention;
 import io.micrometer.observation.ObservationRegistry;
 import io.micrometer.observation.contextpropagation.ObservationThreadLocalAccessor;
+import org.jspecify.annotations.NonNull;
+import org.jspecify.annotations.Nullable;
 import reactor.core.publisher.Mono;
 
-import org.jspecify.annotations.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
 import org.springframework.web.server.ServerWebExchange;