[Doc] Release 2.5.13 (StarRocks#31952)

Signed-off-by: 絵空事スピリット <wanglichen@starrocks.com>

docs/release_notes/release-2.5.md

@@ -1,5 +1,30 @@
 # StarRocks version 2.5
 
+## 2.5.13
+
+Release date: September 28, 2023
+
+### Improvements
+
+- Window functions COVAR_SAMP, COVAR_POP, CORR, VARIANCE, VAR_SAMP, STD, and STDDEV_SAMP now support the ORDER BY clause and Window clause. [#30786](https://github.com/StarRocks/starrocks/pull/30786)
+- An error instead of NULL is returned if a decimal overflow occurs during queries on the DECIMAL type data. [#30419](https://github.com/StarRocks/starrocks/pull/30419)
+- Executing SQL commands with invalid comments now returns results consistent with MySQL. [#30210](https://github.com/StarRocks/starrocks/pull/30210)
+- Rowsets corresponding to tablets that have been deleted are cleaned up, reducing the memory usage during BE startup. [#30625](https://github.com/StarRocks/starrocks/pull/30625)
+
+### Bug Fixes
+
+Fixed the following issues:
+
+- An error "Set cancelled by MemoryScratchSinkOperator" occurs when users read data from StarRocks using the Spark Connector or Flink Connector. [#30702](https://github.com/StarRocks/starrocks/pull/30702) [#30751](https://github.com/StarRocks/starrocks/pull/30751)
+- An error "java.lang.IllegalStateException: null" occurs during queries with an ORDER BY clause that includes aggregate functions. [#30108](https://github.com/StarRocks/starrocks/pull/30108)
+- FEs fail to restart when there are inactive materialized views. [#30015](https://github.com/StarRocks/starrocks/pull/30015)
+- Performing INSERT OVERWRITE operations on duplicate partitions corrupts the metadata, leading to FE restart failures. [#27545](https://github.com/StarRocks/starrocks/pull/27545)
+- An error "java.lang.NullPointerException: null" occurs when users modify columns that do not exist in a Primary Key table. [#30366](https://github.com/StarRocks/starrocks/pull/30366)
+- An error "get TableMeta failed from TNetworkAddress" occurs when users load data into a partitioned StarRocks external table. [#30124](https://github.com/StarRocks/starrocks/pull/30124)
+- In certain scenarios, an error occurs when users load data via CloudCanal. [#30799](https://github.com/StarRocks/starrocks/pull/30799)
+- An error "current running txns on db xxx is 200, larger than limit 200" occurs when users load data via the Flink Connector or perform DELETE and INSERT operations. [#18393](https://github.com/StarRocks/starrocks/pull/18393)
+- Asynchronous materialized views which use HAVING clauses that include aggregate functions cannot rewrite queries properly. [#29976](https://github.com/StarRocks/starrocks/pull/29976)
+
 ## 2.5.12
 
 Release date: September 4, 2023