Build(deps): Bump AngleSharp in /PreMailer.Net/PreMailer.Net.Tests

Bumps [AngleSharp](https://github.com/AngleSharp/AngleSharp) from 1.0.5 to 1.0.6.
- [Release notes](https://github.com/AngleSharp/AngleSharp/releases)
- [Commits](AngleSharp/AngleSharp@v1.0.5...v1.0.6)

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

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

Author: dependabot[bot]

PreMailer.Net/PreMailer.Net/PreMailer.Net.csproj

@@ -23,7 +23,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AngleSharp" Version="1.0.5" />
+    <PackageReference Include="AngleSharp" Version="1.0.6" />
   </ItemGroup>
 
   <ItemGroup>