Add 11-26 release notes

Author: chenjian2664

docs/src/main/sphinx/release/release-479.md

@@ -10,11 +10,13 @@
 * Require the JDK Vector API to be enabled at runtime. ({issue}`27340`)
 * Add support for `SET DEFAULT` and `DROP DEFAULT` statements. ({issue}`26162`)
 * Add {func}`array_first` and {func}`array_last` functions. ({issue}`27295`)
+* Allow field name declaration in ROW literal.  For example, `row(1 as a, 2 as b)` is now legal. ({issue}`25261`)
 * Deprecate `EXPLAIN (TYPE LOGICAL)`. `EXPLAIN (TYPE DISTRIBUTED)` should be used instead. ({issue}`27434`)
 * Improve performance of remote data exchanges on CPUs supporting the required SIMD extensions. This can be disabled by setting `exchange.experimental.vectorized-serde.enabled=false`. ({issue}`27426`, {issue}`26919`)
 * Enhance after `RemoveTrivialFilters` call `RemoveEmptyUnionBranches` to prune empty union branches. ({issue}`21506`)
 * Improve performance of {func}`array_sort` function. ({issue}`27272`)
 * Improve performance of {func}`repeat` function. ({issue}`27369`)
+* Improve performance of data exchanges involving variable width data ({issue}`27377`)
 * Fix planning failure of certain queries where part of the plan is optimized to empty values. ({issue}`21506`)
 * Fix configuring partitioned layout for spooling protocol. ({issue}`27247`)