chore(deps): update davidanson/markdownlint-cli2-action action to v23.1.0 (#56)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[DavidAnson/markdownlint-cli2-action](https://redirect.github.com/DavidAnson/markdownlint-cli2-action)
| action | minor | `v23.0.0` → `v23.1.0` |

---

### Release Notes

<details>
<summary>DavidAnson/markdownlint-cli2-action
(DavidAnson/markdownlint-cli2-action)</summary>

###
[`v23.1.0`](https://redirect.github.com/DavidAnson/markdownlint-cli2-action/compare/v23.0.0...v23.1.0)

[Compare
Source](https://redirect.github.com/DavidAnson/markdownlint-cli2-action/compare/v23.0.0...v23.1.0)

</details>

---

### Configuration

📅 **Schedule**: (UTC)

- Branch creation
  - At any time (no schedule defined)
- 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/pr-checks.yml

@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: DavidAnson/markdownlint-cli2-action@ce4853d43830c74c1753b39f3cf40f71c2031eb9 # v23.0.0
+      - uses: DavidAnson/markdownlint-cli2-action@6b51ade7a9e4a75a7ad929842dd298a3804ebe8b # v23.1.0
         with:
           globs: "content/**/*.md"