Update System.ClientModel dependency to 1.8.1 (#830)

* Initial plan

* Update System.ClientModel to version 1.8.1

Co-authored-by: joseharriaga <45773732+joseharriaga@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: joseharriaga <45773732+joseharriaga@users.noreply.github.com>

Author: Copilot

scripts/Export-Api.ps1

@@ -107,7 +107,7 @@ function Invoke-GenAPI {
     Write-Output ""
 
     # System.ClientModel
-    $systemClientModelPath = Join-Path $nugetPackagesPath "system.clientmodel\1.7.0"
+    $systemClientModelPath = Join-Path $nugetPackagesPath "system.clientmodel\1.8.1"
     $systemClientModelRef = $null
     if (Test-Path $systemClientModelPath) {
         $systemClientModelRef = Get-ChildItem `

src/OpenAI.csproj

@@ -74,7 +74,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
-    <PackageReference Include="System.ClientModel" Version="1.8.0" />
+    <PackageReference Include="System.ClientModel" Version="1.8.1" />
     <PackageReference Include="System.Net.ServerSentEvents" Version="9.0.9" />
   </ItemGroup>