test: Increase PyMilvus version to 2.5.17rc4 for 2.5 branch (#45385)

Automated daily bump from pymilvus 2.5 branch. Updates
tests/python_client/requirements.txt.

Signed-off-by: XuanYang-cn <[email protected]>

Author: XuanYang-cn

tests/python_client/requirements.txt

@@ -28,8 +28,8 @@ pytest-parallel
 pytest-random-order
 
 # pymilvus
-pymilvus==2.5.17rc3
-pymilvus[bulk_writer]==2.5.17rc3
+pymilvus==2.5.17rc4
+pymilvus[bulk_writer]==2.5.17rc4
 
 # for customize config test
 python-benedict==0.24.3