Log Message:
hub: Update to 2.12.6

Changes:
2.12.6
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  * Fix Windows build

2.12.5
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  * Correctly resolve ~/.ssh/config hostname aliases on Windows
  * Added hub pr to fish completions script
  * Have fish completions script wrap git if hub is aliased

2.12.4
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Bug fixes
  * Fix invocation of hub --paginate
  * Consistently expand all occurrences of {owner} and {repo} in hub api
  * Docs: unlist %NC/%Nc among available fields in hub pr list --format

Enhancements
  * GitHub Actions compatibility: infer GITHUB_USER value from
    GITHUB_REPOSITORY if available
  * Handle TERM signal during password prompt in terminal
  * Use consistent quote style in hub sync output