vendor: github.com/danieljoos/wincred v1.2.0

[thaJeztah]

• [x] follow-up to https://github.com/docker/docker-credential-helpers/pull/270

full diff: https://github.com/danieljoos/wincred/compare/v1.1.2...v1.2.0

• Calling SyscallN directly when dealing with pointer-pointers to try to address "Unexpected (nil, nil) result from wincred.GetGenericCredential".
• Bumped required Go version to 1.18.
• Bumped dependency to golang.org/x/sys to version 0.8.0.

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (7ce5629) 55.55% compared to head (069ceb8) 55.55%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #271 +/- ## ======================================= Coverage 55.55% 55.55% ======================================= Files 9 9 Lines 666 666 ======================================= Hits 370 370 Misses 253 253 Partials 43 43 ```

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