Bump SixLabors.ImageSharp from 3.1.3 to 3.1.4 in /xubot

Bumps [SixLabors.ImageSharp](https://github.com/SixLabors/ImageSharp) from 3.1.3 to 3.1.4.
- [Release notes](https://github.com/SixLabors/ImageSharp/releases)
- [Commits](SixLabors/ImageSharp@v3.1.3...v3.1.4)

---
updated-dependencies:
- dependency-name: SixLabors.ImageSharp
  dependency-type: direct:production
...

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

xubot/xubot.csproj

@@ -43,7 +43,7 @@
     <PackageReference Include="Octokit" Version="10.0.0" />
     <PackageReference Include="RedditSharp" Version="2.0.0" />
     <PackageReference Include="SixLabors.Fonts" Version="2.0.2" />
-    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.3" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.4" />
     <PackageReference Include="SixLabors.ImageSharp.Drawing" Version="2.1.1" />
     <PackageReference Include="SteamKit2" Version="2.5.0" />
     <PackageReference Include="System.Configuration.ConfigurationManager" Version="8.0.0" />