Do not support relative static resource paths

Closes gh-33687

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

@@ -140,7 +140,7 @@ public abstract class ResourceHandlerUtils {
 				return true;
 			}
 		}
-		if (path.contains("..") && StringUtils.cleanPath(path).contains("../")) {
+		if (path.contains("../")) {
 			if (logger.isWarnEnabled()) {
 				logger.warn(LogFormatUtils.formatValue(
 						"Path contains \"../\" after call to StringUtils#cleanPath: [" + path + "]", -1, true));