Modify the enumeration judgment usage (#6518)

oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/BrowserLogQueryService.java

@@ -53,7 +53,7 @@ public class BrowserLogQueryService implements Service {
                                                   final Pagination paging) throws IOException {
         PaginationUtils.Page page = PaginationUtils.INSTANCE.exchange(paging);
         BrowserErrorCategory errorCategory = Optional.ofNullable(category)
-                                                     .filter(c -> !c.equals(ErrorCategory.ALL)) // ErrorCategory.All stands for query all.
+                                                     .filter(c -> c != ErrorCategory.ALL) // ErrorCategory.All stands for query all.
                                                      .map(c -> BrowserErrorCategory.valueOf(c.name()))
                                                      .orElse(null);