chore(deps): update nextra packages to v2.12.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
nextra	2.12.2 -> 2.12.3
nextra-theme-docs	2.12.2 -> 2.12.3

---

Release Notes

shuding/nextra (nextra)

v2.12.3

Compare Source

Patch Changes

• ffb6d80: - Fix
  TypeError: Cannot read properties of null (reading 'classList') while
  navigating to route that doesn't have toc with router.push for example

  • Add alias Tabs.Tab to Tab component
  • Add alias Cards.Card to Card component
  • should not attach custom heading id as id attribute if parent is Tabs.Tab
    or Tab
  • should not save to toc list headings of level 1

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.