fix crypto ut test error for windows ci (#29090)

python/paddle/fluid/tests/unittests/test_crypto.py

@@ -22,9 +22,9 @@ import unittest
 class CipherUtilsTestCase(unittest.TestCase):
     def test_gen_key(self):
         key1 = CipherUtils.gen_key(256)
-        key2 = CipherUtils.gen_key_to_file(256, "/tmp/paddle_aes_test.keyfile")
+        key2 = CipherUtils.gen_key_to_file(256, "paddle_aes_test.keyfile")
         self.assertNotEquals(key1, key2)
-        key3 = CipherUtils.read_key_from_file("/tmp/paddle_aes_test.keyfile")
+        key3 = CipherUtils.read_key_from_file("paddle_aes_test.keyfile")
         self.assertEqual(key2, key3)
         self.assertEqual(len(key1), 32)
         self.assertEqual(len(key2), 32)