Bump Microsoft.EntityFrameworkCore.Design in /HighlightBot

Bumps [Microsoft.EntityFrameworkCore.Design](https://github.com/dotnet/efcore) from 6.0.6 to 6.0.13.
- [Release notes](https://github.com/dotnet/efcore/releases)
- [Commits](dotnet/efcore@v6.0.6...v6.0.13)

---
updated-dependencies:
- dependency-name: Microsoft.EntityFrameworkCore.Design
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

HighlightBot/HighlightBot.csproj

@@ -20,7 +20,7 @@
         <PackageReference Include="DSharpPlus.SlashCommands" Version="4.3.0-testing-network-errors-2" />
         <PackageReference Include="Foxite.Common" Version="1.7.0" />
         <PackageReference Include="Microsoft.EntityFrameworkCore" Version="6.0.6" />
-        <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.6">
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.13">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>