docs(boxsdkgen): replace internal links with absolute links (box/box-openapi#570)

[box-sdk-build]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 20310248698

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on codegen-4064-c370934-9d069ca at 16.896%

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Totals
Change from base Build 20310240059:	16.9%
Covered Lines:	10076
Relevant Lines:	37300

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💛 - Coveralls