chore: update nightly docs

[github-actions]

This is an automated PR to update the nightly docs.

[cursor]

PR Summary

Low Risk
Documentation-only submodule sync with no auth, payment, or production logic changes.

Overview
This is an automated pull request from the scheduled Update Nightly Versions workflow (pnpm docs:update:nightly --from-workflow).

When upstream nightly sources move ahead, the script refreshes git submodule pointers for the copies under docs/nightly/ (Sway, fuels, specs, integration docs, and related doc repos). No application or runtime code is touched.

The diff payload for this review did not include concrete hunks—only an empty /dev/null stub—so either this run made no submodule bumps or the changes are not visible in the supplied diff. Reviewers should confirm .gitmodules / submodule commit SHAs if anything did change.

^{Reviewed by Cursor Bugbot for commit 7899757. Bugbot is set up for automated code reviews on this repo. Configure here.}