Update renovate/renovate Docker digest to c386602 (#2)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| renovate/renovate | container | digest | `328686e` -> `c386602` |

---

### 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 has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4yNzkuMCIsInVwZGF0ZWRJblZlciI6IjM3LjI3OS4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Reviewed-on: #2
Co-authored-by: Johnny5 <bot@snaile.de>
Co-committed-by: Johnny5 <bot@snaile.de>

.forgejo/workflows/renovate.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   renovate:
     runs-on: docker
-    container: renovate/renovate@sha256:328686ec82a09ea7fc4326ac03a35dff926a7e85206d7f1b376d6002e04ef526
+    container: renovate/renovate@sha256:c386602757e483f151f08b929219379f2be68913cc3c0f60c65f19076d53a04b
     env:
       RENOVATE_TOKEN: ${{ secrets.RENOVATE_TOKEN }}
       GITHUB_COM_TOKEN: ${{ secrets.GH_NOPRIV_TOKEN }}