Bump CsvHelper from 30.0.1 to 31.0.0 in /src

Bumps [CsvHelper](https://github.com/JoshClose/CsvHelper) from 30.0.1 to 31.0.0.
- [Commits](JoshClose/CsvHelper@30.0.1...31.0.0)

---
updated-dependencies:
- dependency-name: CsvHelper
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

src/azure-cost-cli.csproj

@@ -28,7 +28,7 @@
 
     <ItemGroup>
       <PackageReference Include="Azure.Identity" Version="1.10.4" />
-      <PackageReference Include="CsvHelper" Version="30.0.1" />
+      <PackageReference Include="CsvHelper" Version="31.0.0" />
       <PackageReference Include="JmesPath.Net" Version="1.0.330" />
       <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
       <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="8.0.1" />