chore(rebuild): Mention the risk of filling up the disk in the securi…

…ty considerations. (#278)

* Mention the risk of filling up the disk in the security considerations.

Also be explicit in the "write" and "truncate" steps that these
operations can fail with a QuotaExceededError if the file would be too
big.

Fixes #277

* Update index.bs

Co-authored-by: Austin Sullivan <[email protected]>

Co-authored-by: Austin Sullivan <[email protected]>

SHA: e74baf7
Reason: push, by @mkruisselbrink

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>