Bump Microsoft.Identity.Web.UI from 2.12.2 to 2.12.4 in /src (#2231)

Bumps [Microsoft.Identity.Web.UI](https://github.com/AzureAD/microsoft-identity-web) from 2.12.2 to 2.12.4.
- [Release notes](https://github.com/AzureAD/microsoft-identity-web/releases)
- [Changelog](https://github.com/AzureAD/microsoft-identity-web/blob/master/changelog.md)
- [Commits](AzureAD/microsoft-identity-web@2.12.2...2.12.4)

---
updated-dependencies:
- dependency-name: Microsoft.Identity.Web.UI
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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src/AzureIoTHub.Portal.Server/AzureIoTHub.Portal.Server.csproj

@@ -64,7 +64,7 @@
     <PackageReference Include="Microsoft.OpenApi" Version="1.6.5" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.18.1" />
     <PackageReference Include="Microsoft.Identity.Web" Version="2.12.4" />
-    <PackageReference Include="Microsoft.Identity.Web.UI" Version="2.12.2" />
+    <PackageReference Include="Microsoft.Identity.Web.UI" Version="2.12.4" />
     <PackageReference Include="MudBlazor" Version="6.4.1" />
     <PackageReference Include="NetEscapades.AspNetCore.SecurityHeaders" Version="0.19.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />