Update VS Code tutorial series for .NET 7

[marbradev]

On step 6, on the 7.0 tab, make sure the command reflects 7.0 not 6.0 -> dotnet new console --framework net7.0

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Document Details

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• ID: 8cc2e9c-f333-f6a1-064e-790d950b684c
• Version Independent ID: 25a4c9b9-2808-e296-df03-5837000dcbad
• Content: Create a .NET console application using Visual Studio Code - .NET
• Content Source: docs/core/tutorials/with-visual-studio-code.md
• Product: dotnet-fundamentals
• GitHub Login: @tdykstra
• Microsoft Alias: tdykstra

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Associated WorkItem - 340919

[tdykstra]

@MBJR24 thanks for reporting this oversight. There were several more places that needed the same update, and they're getting fixed in PR #32540