Backport pythongh-110125: Fix test_mmap PROT_EXEC comment

Author: BCSharp

Src/StdLib/Lib/test/test_mmap.py

@@ -245,7 +245,7 @@ def test_access_parameter(self):
                 try:
                     m = mmap.mmap(f.fileno(), mapsize, prot=prot)
                 except PermissionError:
-                    # on macOS 14, PROT_READ | PROT_WRITE is not allowed
+                    # on macOS 14, PROT_READ | PROT_EXEC is not allowed
                     pass
                 else:
                     self.assertRaises(TypeError, m.write, b"abcdef")