enhance: [2.6] update knowhere version (#45271)

issue: #42937 
pr: #45270

Signed-off-by: xianliang.li <xianliang.li@zilliz.com>

Author: foxspy

internal/core/thirdparty/knowhere/CMakeLists.txt

@@ -14,7 +14,7 @@
 # Update KNOWHERE_VERSION for the first occurrence
 milvus_add_pkg_config("knowhere")
 set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY INCLUDE_DIRECTORIES "")
-set( KNOWHERE_VERSION deadb8e )
+set( KNOWHERE_VERSION v2.6.5 )
 set( GIT_REPOSITORY  "https://github.com/zilliztech/knowhere.git")
 
 message(STATUS "Knowhere repo: ${GIT_REPOSITORY}")