Optimize ResourceUrlProvider

Closes gh-2008

spring-webflux/src/main/java/org/springframework/web/reactive/resource/ResourceUrlProvider.java

@@ -144,9 +144,8 @@ public class ResourceUrlProvider implements ApplicationListener<ContextRefreshed
 	private Mono<String> resolveResourceUrl(ServerWebExchange exchange, PathContainer lookupPath) {
 		return this.handlerMap.entrySet().stream()
 				.filter(entry -> entry.getKey().matches(lookupPath))
-				.sorted((entry1, entry2) ->
+				.min((entry1, entry2) ->
 						PathPattern.SPECIFICITY_COMPARATOR.compare(entry1.getKey(), entry2.getKey()))
-				.findFirst()
 				.map(entry -> {
 					PathContainer path = entry.getKey().extractPathWithinPattern(lookupPath);
 					int endIndex = lookupPath.elements().size() - path.elements().size();