Bump Microsoft.AspNetCore.App from 2.1.0 to 2.1.4 in /UploadHandleCore
Bump Microsoft.AspNetCore.App from 2.1.0 to 2.1.4 in /UploadHandleCore

Bumps [Microsoft.AspNetCore.App](https://github.com/aspnet/Universe) from 2.1.0 to 2.1.4.
- [Release notes](https://github.com/aspnet/Universe/releases)
- [Changelog](https://github.com/aspnet/Universe/blob/master/docs/CrossRepoBreakingChanges.md)
- [Commits](https://github.com/aspnet/Universe/compare/2.1.0...2.1.4)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
tianma3798/Uploader,tianma3798/Uploader,tianma3798/Uploader