Bump Microsoft.Extensions.Configuration.Json
Bump Microsoft.Extensions.Configuration.Json

Bumps [Microsoft.Extensions.Configuration.Json](https://github.com/aspnet/Extensions) from 3.0.0-preview8.19405.4 to 3.0.0.
- [Release notes](https://github.com/aspnet/Extensions/releases)
- [Commits](https://github.com/aspnet/Extensions/compare/v3.0.0-preview8.19405.4...v3.0.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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