[skip e2e] Refine test case name (milvus-io#15058)

Signed-off-by: Binbin Lv <binbin.lv@zilliz.com>

Author: binbinlv

tests/python_client/testcases/test_partition_20.py

@@ -254,7 +254,7 @@ def test_load_partiton_respectively(self):
                           check_items=error)
 
     @pytest.mark.tags(CaseLabel.L2)
-    def test_load_partitons_after_release(self):
+    def test_load_partitions_after_release(self):
         """
         target: test release the partition after load partition
         method: load partitions and release partitions