Update actions/setup-dotnet action to v1.9.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-dotnet	action	minor	v1.7.2 -> v1.9.1

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Release Notes

actions/setup-dotnet (actions/setup-dotnet)

v1.9.1: Installer scripts updates

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Update dotnet-install scripts to the latest versions: #​270

v1.9.0: Support for installation of multiple versions, warnings for deprecated versions

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This release includes the following PRs:

• Adding support to install multiple .NET versions in single action invocation: #​240
  example:

- uses: actions/setup-dotnet@v1
  with:
    dotnet-version: | 
      3.1.x
      5.0.x

The latest installed .NET version is default, according .NET documentation.

• Adding the build warnings if the deprecated .NET versions are installed by action: #​245

v1.8.2: Package Updates, Improvement for global.json handling

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• Bump path-parse from 1.0.6 to 1.0.7 #​222
• Update installer scripts #​226
• Support rollForward option for global.json #​224

v1.8.1: Update packages

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• Bump ws from 7.3.1 to 7.5.0 #​212
• Bump hosted-git-info from 2.8.8 to 2.8.9 #​198
• Bump lodash from 4.17.20 to 4.17.21 #​197
• Bump node-notifier from 8.0.0 to 8.0.1 #​158
• Update installers scripts #​204

v1.8.0: Support of preview versions, input validation improvements and other bug fixes

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This release includes the following PRs:

• Add include-prerelease input to be able to match latest prerelease versions https://github.com/actions/setup-dotnet/pull/110
• Support various nuget.config name formats https://github.com/actions/setup-dotnet/pull/188
• Add workaround to fix BOM-related error during parsing global.json https://github.com/actions/setup-dotnet/pull/192
• Improve key names validation from user' nuget config https://github.com/actions/setup-dotnet/pull/187
• Fix for 5.x notation https://github.com/actions/setup-dotnet/pull/175

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