This pull request updates the following dependencies

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## From https://dev.azure.com/dnceng/internal/_git/dotnet-winforms
- **Subscription**: a88d6455-e128-4280-39b4-08d960f4ca81
- **Build**: 20230621.4
- **Date Produced**: June 21, 2023 5:20:08 PM UTC
- **Commit**: 7f67c1539dcfa02ef740306820b44a713bdcb525
- **Branch**: refs/heads/internal/release/6.0

[DependencyUpdate]: <> (Begin)

- **Updates**:
  - **Microsoft.Dotnet.WinForms.ProjectTemplates**: [from 6.0.20-servicing.23320.10 to 6.0.20-servicing.23321.4][1]
  - **Microsoft.Private.Winforms**: [from 6.0.20-servicing.23320.10 to 6.0.20-servicing.23321.4][1]

[1]: https://dev.azure.com/dnceng/internal/_git/dotnet-winforms/branches?baseVersion=GC2536781675&targetVersion=GC7f67c1539d&_a=files

[DependencyUpdate]: <> (End)

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