Bump Microsoft.TypeScript.MSBuild from 4.9.3 to 4.9.4 in /src (#1656)

Bumps Microsoft.TypeScript.MSBuild from 4.9.3 to 4.9.4.

---
updated-dependencies:
- dependency-name: Microsoft.TypeScript.MSBuild
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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src/AzureIoTHub.Portal.Client/AzureIoTHub.Portal.Client.csproj

@@ -22,7 +22,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.Extensions.Http" Version="7.0.0" />
-    <PackageReference Include="Microsoft.TypeScript.MSBuild" Version="4.9.3">
+    <PackageReference Include="Microsoft.TypeScript.MSBuild" Version="4.9.4">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>