Bumps [Microsoft.AspNetCore.Authentication.JwtBearer](https://github.com/aspnet/AspNetCore) from 3.1.7 to 3.1.8.
- [Release notes](https://github.com/aspnet/AspNetCore/releases)
- [Commits](https://github.com/aspnet/AspNetCore/compare/v3.1.7...v3.1.8)
Signed-off-by: Ndependabot-preview[bot] <support@dependabot.com>