Bump System.CommandLine.Rendering

Bumps [System.CommandLine.Rendering](https://github.com/dotnet/command-line-api) from 0.3.0-alpha.19577.1 to 0.3.0-alpha.21216.1.
- [Release notes](https://github.com/dotnet/command-line-api/releases)
- [Changelog](https://github.com/dotnet/command-line-api/blob/main/docs/History.md)
- [Commits](https://github.com/dotnet/command-line-api/commits)

---
updated-dependencies:
- dependency-name: System.CommandLine.Rendering
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

TabletBot/TabletBot.csproj

@@ -8,7 +8,7 @@
   <ItemGroup>
     <PackageReference Include="System.CommandLine.DragonFruit" Version="0.3.0-alpha.19577.1" />
     <PackageReference Include="System.CommandLine.Experimental" Version="0.3.0-alpha.19577.1" />
-    <PackageReference Include="System.CommandLine.Rendering" Version="0.3.0-alpha.19577.1" />
+    <PackageReference Include="System.CommandLine.Rendering" Version="0.3.0-alpha.21216.1" />
     <PackageReference Include="System.Reactive.Core" Version="5.0.0" />
   </ItemGroup>