Add new GitHub Actions URL environment variables

[gitfool]

See default environment variables:

• GITHUB_API_URL. Returns the API URL. For example: https://api.github.com.
• GITHUB_GRAPHQL_URL. Returns the GraphQL API URL. For example: https://api.github.com/graphql.
• GITHUB_SERVER_URL. Returns the URL of the GitHub server. For example: https://github.com.

[patriksvensson]

Sounds like a good idea! 👍

[cake-build-bot]

🎉 This issue has been resolved in version v1.0.0 🎉

The release is available on:

• GitHub Release
• NuGet Package
• Chocolatey Package
• .Net Global Tool

Your GitReleaseManager bot 📦🚀