(deps): Bump System.CommandLine

Bumps the microsoft group with 1 update in the /new-cli directory: [System.CommandLine](https://github.com/dotnet/command-line-api).


Updates `System.CommandLine` from 2.0.0-beta5.25210.1 to 2.0.0-beta5.25218.1
- [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
  dependency-version: 2.0.0-beta5.25218.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: microsoft
...

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

Author: dependabot[bot]

new-cli/Directory.Packages.props

@@ -20,7 +20,7 @@
     <PackageVersion Include="Serilog.Sinks.Console" Version="6.0.0" />
     <PackageVersion Include="Serilog.Sinks.File" Version="6.0.0" />
     <PackageVersion Include="Serilog.Sinks.Map" Version="2.0.0" />
-    <PackageVersion Include="System.CommandLine" Version="2.0.0-beta5.25210.1" />
+    <PackageVersion Include="System.CommandLine" Version="2.0.0-beta5.25218.1" />
     <PackageVersion Include="System.IO.Abstractions" Version="22.0.13" />
     <PackageVersion Include="System.Text.Json" Version="9.0.4" />
   </ItemGroup>