Update zone pivots for .NET 9

[gewarren]

Contributes to #43163

Update zone pivot definitions for .NET 9. Remove zones for out-of-support versions (.NET 6 and .NET 7).

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docs/core/deploying/trimming/prepare-libraries-for-trimming.md	Prepare .NET libraries for trimming
docs/core/deploying/trimming/trimming-options.md	Trimming options
docs/core/docker/build-container.md	Tutorial: Containerize a .NET app
docs/core/docker/publish-as-container.md	Containerize an app with dotnet publish
docs/core/tutorials/cli-templates-create-template-package.md	Tutorial: Create a template package
docs/core/tutorials/debugging-with-visual-studio-code.md	docs/core/tutorials/debugging-with-visual-studio-code
docs/core/tutorials/debugging-with-visual-studio.md	Tutorial: Debug a .NET console application using Visual Studio
docs/core/tutorials/library-with-visual-studio-code.md	Create a .NET class library using Visual Studio Code
docs/core/tutorials/library-with-visual-studio.md	Tutorial: Create a .NET class library using Visual Studio
docs/core/tutorials/publishing-with-visual-studio-code.md	docs/core/tutorials/publishing-with-visual-studio-code
docs/core/tutorials/publishing-with-visual-studio.md	Tutorial: Publish a .NET console application using Visual Studio
docs/core/tutorials/testing-library-with-visual-studio-code.md	Test a .NET class library using Visual Studio Code
docs/core/tutorials/testing-library-with-visual-studio.md	Tutorial: Test a .NET class library with .NET using Visual Studio
docs/core/tutorials/with-visual-studio-code.md	docs/core/tutorials/with-visual-studio-code
docs/core/tutorials/with-visual-studio.md	Tutorial: Create a .NET console application using Visual Studio
docs/fundamentals/code-analysis/style-rules/ide0028.md	"IDE0028: Use collection initializers or expressions"
docs/standard/base-types/regular-expression-source-generators.md	.NET regular expression source generators
docs/standard/serialization/system-text-json/configure-options.md	How to instantiate JsonSerializerOptions instances with System.Text.Json
docs/standard/serialization/system-text-json/converters-how-to.md	docs/standard/serialization/system-text-json/converters-how-to
docs/standard/serialization/system-text-json/customize-properties.md	How to customize property names and values with System.Text.Json
docs/standard/serialization/system-text-json/migrate-from-newtonsoft.md	"Migrate from Newtonsoft.Json to System.Text.Json - .NET"
docs/standard/serialization/system-text-json/polymorphism.md	How to serialize properties of derived classes with System.Text.Json
docs/standard/serialization/system-text-json/reflection-vs-source-generation.md	docs/standard/serialization/system-text-json/reflection-vs-source-generation
docs/standard/serialization/system-text-json/source-generation-modes.md	Source-generation modes in System.Text.Json
docs/standard/serialization/system-text-json/source-generation.md	How to use source generation in System.Text.Json
docs/zone-pivot-groups.yml	docs/zone-pivot-groups

[gewarren]

Muchas graçias @adegeo!