Update dotnet dev-certs docs for .NET 10 SANs

[Copilot]

• Inspect the PR comment, existing dotnet dev-certs article text, and the validation workflow for the touched documentation file.
• Update the SAN description to call out *.dev.localhost hostnames for local development and clarify that container-based scenarios relate to host.docker.internal and host.containers.internal.
• Re-run targeted markdown linting and review the diff for the updated file.
• Run final automated review for the follow-up edit and reply to the PR comment with the addressing commit.

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📄 File	🔗 Preview link
docs/core/tools/dotnet-dev-certs.md	dotnet dev-certs