Also need to import this.

CURA-7180

cura/OAuth2/KeyringAttribute.py

@@ -15,6 +15,7 @@ if TYPE_CHECKING:
 import sys
 from UM.Platform import Platform
 if Platform.isWindows() and hasattr(sys, "frozen"):
+    import win32timezone
     from keyring.backends.Windows import WinVaultKeyring
     keyring.set_keyring(WinVaultKeyring())