Bump YamlDotNet from 13.7.1 to 15.1.1

[dependabot[bot]]

Bumps YamlDotNet from 13.7.1 to 15.1.1.

Release notes

Sourced from YamlDotNet's releases.

Release 15.1.1

• Merge pull request #902 from EdwardCooke/ec-901
  Fixed #901 - private constructor and tag issue

Release 15.1.0

• Update the NuGet API key

• Merge pull request #897 from EdwardCooke/ec-net80-enumsasnumbers
  Enables #773
  Adds naming conventions for convert enums to/from scalars
  Adds .NET8 binaries
  Adds support for custom formatting of enums, easy to expose enums as integers or whatever else.
  Quotes necessary enum strings (Null for example)
  Breaking: For those that get impacted pass in NullNamingConvention.Instance to the EnumNamingConvetion arguments on the constructor
  Breaking: Removed many of the redundant constructors for the classes, pass in the old default values to the new constructors

• Merge pull request #898 from EdwardCooke/ec-removeoldframeworks
  Breaking: Removes old frameworks, .net35, .net45

• Merge pull request #895 from stijnherreman/issue-677
  Make the type converters available to custom pre-processing phase visitors.

• Merge pull request #899 from EdwardCooke/ec-includenet80
  Added .net8 libraries to appveyor

• Merge pull request #887 from dougbu/dougbu/blank.lines.886
  Handle blank lines in Yaml.Text()

Commits

• 19d7875 Merge pull request #902 from EdwardCooke/ec-901
• b735083 Fixed #901 - private constructor and tag issue
• fa65881 Merge pull request #887 from dougbu/dougbu/blank.lines.886
• 7daf14c Merge pull request #899 from EdwardCooke/ec-includenet80
• cfac11b Added .net8 libraries to appveyor
• 0ca7b09 Merge pull request #895 from stijnherreman/issue-677
• 3f75e84 Make the type converters available to custom pre-processing phase visitors.
• 04a9dbb Merge pull request #898 from EdwardCooke/ec-removeoldframeworks
• 8e75e9e Added .net8 to the nuspec and removed old frameworks
• 613627e Updated build project to net80 and new nugets
• Additional commits viewable in compare view

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Superseded by #243.