Check our published documentation to identify any references to .NET7

[Sophietn]

What: Check our published documentation to identify any references to .NET7 Why: So we know what (if any) pages we need to update with our v1.4 release SoW:

• [x] Review Graduation documentation, markdown files and all Docusaurus pages

• [x] Identify and document below any references to .NET7 that need updating

• README.md - no ref

• Contributing.md - no ref

• Enablement.md - 2 references

1. .NET Core 6.0 in 2.1 Pre-requisites System Requirements
2. Local project settings, links out to .NET Core 6.0 default .NET configuration

• Configuration.md - references .NET although links may already be updated to .net8.

• Packaging.md - references .NET although links may already be updated to .net8.

• Quickstart.md- references .NET although links may already be updated to .net8.

• Carbon Aware WebAPI tutuorial - references .NET although links may already be updated to .net8.

• Test coverage - no ref

• Fit within Theory of Change - no ref

• Adopters.md - no ref

• Security.md - references .net6 5 times, under Use basic good cryptographic practices

[Sophietn]

@vaughanknight @danuw FYI I have reviewed all our documentation, and listed in bold the pages here in bold that reference .NET. Enablement & security both reference .NET6 so these will definitely need updating. The others look like the links have already been replaced with .NET8 / autolink to latest .NET package.