[3.14] Update bytecode magic number in tests for the 3.14 release candidate (GH-136427) (#136429)

Co-authored-by: Hugo van Kemenade <[email protected]>

Author: miss-islington

Lib/test/test_importlib/test_util.py

@@ -635,7 +635,7 @@ def test_magic_number(self):
         # stakeholders such as OS package maintainers must be notified
         # in advance. Such exceptional releases will then require an
         # adjustment to this test case.
-        EXPECTED_MAGIC_NUMBER = 3495
+        EXPECTED_MAGIC_NUMBER = 3625
         actual = int.from_bytes(importlib.util.MAGIC_NUMBER[:2], 'little')
 
         msg = (