Bump pymdown-extensions from 10.11.2 to v10.12

[dghubble-renovate]

This PR contains the following updates:

Package	Update	Change
pymdown-extensions	minor	==10.11.2 -> ==10.12

---

Release Notes

facelessuser/pymdown-extensions (pymdown-extensions)

v10.12

Compare Source

10.12

• NEW: Blocks: Blocks extensions no longer considered in beta.
• NEW: Details: Details is marked as "legacy" in documentation in favor of the new pymdownx.blocks.details approach.
• NEW: Tabbed: Tabbed is marked as "legacy" in documentation in favor of the new pymdownx.blocks.tab approach.
• NEW: Caption: Add new "blocks" style extension called Caption which helps with specifying figures with captions.
• NEW: Emoji: Add a new strict option that will raise an exception if an emoji is used whose name has changed,
  removed, or never existed.
• FIX: Emoji: Emoji links should be generated such that they point to the new CDN version.

---

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 this update again.

---

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