Add link to Spaceship Debugging docs from Tooling and Debugging docs (#20849)
Add link to Spaceship Debugging docs from Tooling and Debugging docs (#20849)

When looking for documentation on the Spaceship proxy options, I realized the Spaceship debugging docs link to the main debugging documentation, but not vice-versa. This would have been helpful to discover the `SPACESHIP_PROXY` option sooner, and will hopefully help others.
fastlane/fastlane,fastlane/fastlane,fastlane/fastlane,fastlane/fastlane,fastlane/fastlane,fastlane/fastlane