Bump Microsoft.TypeScript.MSBuild from 5.1.3 to 5.1.5 in /src (#2273)

Bumps Microsoft.TypeScript.MSBuild from 5.1.3 to 5.1.5.

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/IoTHub.Portal.Client/IoTHub.Portal.Client.csproj

@@ -29,7 +29,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.Extensions.Http" Version="7.0.0" />
-    <PackageReference Include="Microsoft.TypeScript.MSBuild" Version="5.1.3">
+    <PackageReference Include="Microsoft.TypeScript.MSBuild" Version="5.1.5">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>