chore(deps): update actions/configure-pages action to v6 (#428)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/configure-pages](https://redirect.github.com/actions/configure-pages)
| action | major | `v5` → `v6` |

---

### Release Notes

<details>
<summary>actions/configure-pages (actions/configure-pages)</summary>

###
[`v6`](https://redirect.github.com/actions/configure-pages/compare/v5...v6)

[Compare
Source](https://redirect.github.com/actions/configure-pages/compare/v5...v6)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "every weekday" (UTC), Automerge - At
any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **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.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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.github/workflows/docs.yaml

@@ -140,7 +140,7 @@ jobs:
           name: sphinx-doc
           path: docs/python/
       - name: Setup pages
-        uses: actions/configure-pages@v5
+        uses: actions/configure-pages@v6
       - name: Upload docs to github pages
         uses: actions/upload-pages-artifact@v4
         with: