Bump System.Text.Json and System.Threading.Tasks.Extensions (#1240)

Bumps [System.Text.Json](https://github.com/dotnet/runtime) and System.Threading.Tasks.Extensions. These dependencies needed to be updated together.

Updates `System.Text.Json` from 8.0.5 to 9.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.5...v9.0.0)

Updates `System.Threading.Tasks.Extensions` from 4.6.0 to 4.5.4

---
updated-dependencies:
- dependency-name: System.Text.Json
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: System.Threading.Tasks.Extensions
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Minio/Minio.csproj

@@ -30,7 +30,7 @@
 	</ItemGroup>
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-	  <PackageReference Include="System.Text.Json" Version="8.0.5" />
+	  <PackageReference Include="System.Text.Json" Version="9.0.0" />
 	</ItemGroup>
 
 </Project>