Bump windows_i686_gnu from 0.52.5 to 0.52.6 (#452)

Bumps [windows_i686_gnu](https://github.com/microsoft/windows-rs) from 0.52.5 to 0.52.6.
- [Release notes](https://github.com/microsoft/windows-rs/releases)
- [Commits](https://github.com/microsoft/windows-rs/commits)

---
updated-dependencies:
- dependency-name: windows_i686_gnu
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>