[skip ci] Shorten long sentence (#10930)

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

tests/python_client/testcases/test_delete_20.py

@@ -32,7 +32,7 @@ class TestDeleteParams(TestcaseBase):
         target: test delete data from collection
         method: 1.create and insert nb with flush
                 2.load collection
-                3. delete half of nb
+                3.delete half of nb
                 4.query with deleted ids
         expected: Query result is empty
         """

tests/python_client/testcases/test_index.py

@@ -1138,7 +1138,8 @@ class TestIndexBinary:
     def test_drop_index_partition(self, connect, binary_collection, get_jaccard_index):
         """
         target: test drop index interface
-        method: create collection, create partition and add entities in it, create index on collection, call drop collection index
+        method: create collection, create partition and add entities in it,
+                create index on collection, call drop collection index
         expected: return code 0, and default index param
         """
         connect.create_partition(binary_collection, default_tag)