Bump SixLabors.ImageSharp from 3.1.11 to 3.1.12 (#985)

Updated [SixLabors.ImageSharp](https://github.com/SixLabors/ImageSharp)
from 3.1.11 to 3.1.12.

<details>
<summary>Release notes</summary>

_Sourced from [SixLabors.ImageSharp's
releases](https://github.com/SixLabors/ImageSharp/releases)._

## 3.1.12

## What's Changed
* v3 : Add Full Metadata Parsing for WEBP Animations by
@​JimBobSquarePants in SixLabors/ImageSharp#3002
* V3: Prevent negative allocation attempt for huge TIFF files by
@​JimBobSquarePants in SixLabors/ImageSharp#3004
* Backport v3 : Tiff decoder: Fix issue 2679 by @​JimBobSquarePants in
SixLabors/ImageSharp#3007


**Full Changelog**:
SixLabors/ImageSharp@v3.1.11...v3.1.12

Commits viewable in [compare
view](SixLabors/ImageSharp@v3.1.11...v3.1.12).
</details>

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</details>

Author: jvyden

Refresh.Core/Refresh.Core.csproj

@@ -26,7 +26,7 @@
         <PackageReference Include="NPTicket" Version="3.1.1" />
         <PackageReference Include="Pfim" Version="0.11.3" />
         <PackageReference Include="SharpZipLib" Version="1.4.2" />
-        <PackageReference Include="SixLabors.ImageSharp" Version="3.1.11" />
+        <PackageReference Include="SixLabors.ImageSharp" Version="3.1.12" />
         <PackageReference Include="EasyHotReload" Version="1.0.0" />
     </ItemGroup>