Bump MudBlazor from 5.0.14 to 5.0.15 (#292)

Bumps [MudBlazor](https://github.com/Garderoben/MudBlazor) from 5.0.14 to 5.0.15.
- [Release notes](https://github.com/Garderoben/MudBlazor/releases)
- [Changelog](https://github.com/Garderoben/MudBlazor/blob/dev/CHANGELOG.md)
- [Commits](https://github.com/Garderoben/MudBlazor/compare/v5.0.14...v5.0.15)

---
updated-dependencies:
- dependency-name: MudBlazor
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

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

ErsatzTV/ErsatzTV.csproj

@@ -34,7 +34,7 @@
         <PrivateAssets>all</PrivateAssets>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       </PackageReference>
-      <PackageReference Include="MudBlazor" Version="5.0.14" />
+      <PackageReference Include="MudBlazor" Version="5.0.15" />
       <PackageReference Include="PPioli.FluentValidation.Blazor" Version="5.0.0" />
       <PackageReference Include="Refit.HttpClientFactory" Version="6.0.38" />
       <PackageReference Include="Serilog" Version="2.10.0" />