Updated [SixLabors.ImageSharp](https://github.com/SixLabors/ImageSharp)
from 3.1.10 to 3.1.11.

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<summary>Release notes</summary>

_Sourced from [SixLabors.ImageSharp's
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## 3.1.11

## What's Changed
* Backport V3 - GIF: Check for end of stream when reading comments. by
@​JimBobSquarePants in SixLabors/ImageSharp#2955


**Full Changelog**:
SixLabors/ImageSharp@v3.1.10...v3.1.11

Commits viewable in [compare
view](SixLabors/ImageSharp@v3.1.10...v3.1.11).
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