docs: fix root sitemap.xml in multiversion builds

[dgarcia360]

Not necessary, fixed by #939

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: c09b4140-392b-4ee2-831f-0056fe218c36

📥 Commits

Reviewing files that changed from the base of the PR and between bcc2d3d and 636479b.

⛔ Files ignored due to path filters (1)

• docs/uv.lock is excluded by !**/*.lock

📒 Files selected for processing (1)

• docs/pyproject.toml

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📝 Walkthrough

Walkthrough

The documentation build dependency sphinx-scylladb-theme minimum version is updated from >=1.9.2 to >=1.9.3 in docs/pyproject.toml.

Possibly related PRs

• scylladb/python-driver#939: Updates the same documentation theme dependency constraint.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: fixing the root sitemap for multiversion docs builds.
Description check	✅ Passed	The description covers Problem, Solution, and How to test, but it omits the template checklist and Fixes annotations.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Fix failing CI checks

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