[New git version] v2.31.0-rc0

[github-actions]

https://github.com/git/git/releases/tag/v2.31.0-rc0

[dscho]

PR is up: #3060

[dscho]

Git artifacts run: https://dev.azure.com/git-for-windows/git/_build/results?buildId=71584&view=results

[dscho]

Release pipeline run: https://dev.azure.com/git-for-windows/git/_releaseProgress?_a=release-pipeline-progress&releaseId=106

[dscho]

Released: https://github.com/git-for-windows/git/releases/tag/v2.31.0-rc0.windows.1