Editorial: Align with Web IDL specification

[autokagami]

🤖 This is an automated pull request to align the spec with the latest Web IDL specification. 🤖

The followings are the Web IDL validation messages, which may help understanding this PR:

• Validation error at line 3 in tracking-dnt,1, inside `interface Navigator -> operation storeTrackingException -> argument properties`:
              TrackingExData properties
                             ^

  Error: Dictionary argument must be optional if it has no required fields

• Validation error at line 2 in tracking-dnt,2:
          Promise<void> removeTrackingException (
                  ^

  Error: void is now replaced by undefined. Refer to the relevant GitHub issue for more information.

• Validation error at line 3 in tracking-dnt,2, inside `interface Navigator -> operation removeTrackingException -> argument properties`:
            TrackingExData properties
                           ^

  Error: Dictionary argument must be optional if it has no required fields

• Validation error at line 3 in tracking-dnt,3, inside `interface Navigator -> operation trackingExceptionExists -> argument properties`:
            TrackingExData properties
                           ^

  Error: Dictionary argument must be optional if it has no required fields

Currently this autofix might introduce awkward code formatting, and feel free to manually fix it whenever it happens.

Please file an issue at https://github.com/saschanaz/webidl-updater/issues/new if you think this is invalid or should be enhanced.