Related to #44647
Update milvus-storage from 91df193 to 839a8e5 to include
milvus-io/milvus-storage#342, which fixes a race condition in
S3GlobalContext initialization.
The fix moves the is_initialized_ flag update from before DoInitialize()
to after it completes. This ensures the initialization flag is only set
to true after the actual initialization is done, preventing potential
issues if DoInitialize() fails or if other code checks the flag during
initialization.
Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>