chore: bump up actions/setup-python action to v7 (#15416)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/setup-python](https://redirect.github.com/actions/setup-python)
| action | major | `v6` → `v7` |

---

### Release Notes

<details>
<summary>actions/setup-python (actions/setup-python)</summary>

###
[`v7.0.0`](https://redirect.github.com/actions/setup-python/compare/v6.3.0...v7.0.0)

[Compare
Source](https://redirect.github.com/actions/setup-python/compare/v7.0.0...v7.0.0)

###
[`v7`](https://redirect.github.com/actions/setup-python/compare/v6.3.0...v7.0.0)

[Compare
Source](https://redirect.github.com/actions/setup-python/compare/v6.3.0...v7.0.0)

</details>

---

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.github/workflows/release-mobile.yml

@@ -185,7 +185,7 @@ jobs:
           no-build: 'true'
       - name: Cap sync
         run: yarn workspace @affine/android cap sync
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@v7
         with:
           python-version: '3.13'
       - name: Auth gcloud