chore(deps): update astral-sh/setup-uv action to v7 (#73)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [astral-sh/setup-uv](https://redirect.github.com/astral-sh/setup-uv) |
action | major | `v6` -> `v7` |

---

### Release Notes

<details>
<summary>astral-sh/setup-uv (astral-sh/setup-uv)</summary>

###
[`v7`](https://redirect.github.com/astral-sh/setup-uv/compare/v6...v7)

[Compare
Source](https://redirect.github.com/astral-sh/setup-uv/compare/v6...v7)

</details>

---

### Configuration

📅 **Schedule**: 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

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/njzjz/wenxian).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS4xMzEuOSIsInVwZGF0ZWRJblZlciI6IjQxLjEzMS45IiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbXX0=-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

action.yml

@@ -12,7 +12,7 @@ runs:
   using: composite
   steps:
     - name: Install the latest version of uv
-      uses: astral-sh/setup-uv@v6
+      uses: astral-sh/setup-uv@v7
     - name: Run wenxian
       id: run-wenxian
       run: |