chore(deps): update suzuki-shunsuke/github-action-renovate-config-validator action to v2.1.0 (#442)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[suzuki-shunsuke/github-action-renovate-config-validator](https://redirect.github.com/suzuki-shunsuke/github-action-renovate-config-validator)
| action | minor | `v2.0.0` → `v2.1.0` |

---

### Release Notes

<details>
<summary>suzuki-shunsuke/github-action-renovate-config-validator
(suzuki-shunsuke/github-action-renovate-config-validator)</summary>

###
[`v2.1.0`](https://redirect.github.com/suzuki-shunsuke/github-action-renovate-config-validator/releases/tag/v2.1.0)

[Compare
Source](https://redirect.github.com/suzuki-shunsuke/github-action-renovate-config-validator/compare/v2.0.0...v2.1.0)

#### Features


[#&#8203;1092](https://redirect.github.com/suzuki-shunsuke/github-action-renovate-config-validator/issues/1092)
Enable npm cache by default

Cache improves the performance and mitigates the API Rate Limit Issues.

</details>

---

### Configuration

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

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, 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/diranged/oz).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My41Ni4wIiwidXBkYXRlZEluVmVyIjoiNDMuNTYuMCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

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

Author: renovate[bot]

.github/workflows/renovate.yml

@@ -12,4 +12,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: suzuki-shunsuke/github-action-renovate-config-validator@v2.0.0
+      - uses: suzuki-shunsuke/github-action-renovate-config-validator@v2.1.0