fix: appDireactory missing for windows-sign options

[rickymohk]

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• [ ] The changes are appropriately documented (if applicable).
• [ ] The changes have sufficient test coverage (if applicable).
• [ ] The testsuite passes successfully on my local machine (if applicable).

Summarize your changes: Fixing windows-sign does not work due to appDirectory missing.

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 89.06%. Comparing base (00d20b9) to head (7ecc0d8).

Files	Patch %	Lines
src/win32.ts	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1731 +/- ## ======================================= Coverage 89.06% 89.06% ======================================= Files 17 17 Lines 905 905 Branches 187 187 ======================================= Hits 806 806 Misses 62 62 Partials 37 37 ```

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[felixrieseberg]

The test failure is unrelated and exists on main, merging.

[welcome[bot]]

Thanks for your contribution! 🎉

[continuous-auth[bot]]

:tada: This PR is included in version 18.3.3 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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