chore(deps): update https://github.com/crazy-max/ghaction-import-gpg action to v7 (#103)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [https://github.com/crazy-max/ghaction-import-gpg](https://github.com/crazy-max/ghaction-import-gpg) | action | major | `v6` → `v7` |

---

### Release Notes

<details>
<summary>crazy-max/ghaction-import-gpg (https://github.com/crazy-max/ghaction-import-gpg)</summary>

### [`v7`](https://github.com/crazy-max/ghaction-import-gpg/compare/v6...v7)

[Compare Source](https://github.com/crazy-max/ghaction-import-gpg/compare/v6...v7)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - Only on Sunday and Saturday ( * * * * 0,6 ) (UTC), Automerge - Between 12:00 AM and 03:59 AM ( * 0-3 * * * ) (UTC).

🚦 **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:eyJjcmVhdGVkSW5WZXIiOiI0My41Ni4xIiwidXBkYXRlZEluVmVyIjoiNDMuNTYuMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsia2luZC9kZXBlbmRlbmN5Il19-->

Reviewed-on: https://gitea.com/gitea/helm-actions/pulls/103
Reviewed-by: DaanSelen <135789+daanselen@noreply.gitea.com>
Co-authored-by: Renovate Bot <renovate-bot@gitea.com>
Co-committed-by: Renovate Bot <renovate-bot@gitea.com>

.gitea/workflows/release-version.yml

@@ -35,7 +35,7 @@ jobs:
 
       - name: Import GPG key
         id: import_gpg
-        uses: https://github.com/crazy-max/ghaction-import-gpg@v6
+        uses: https://github.com/crazy-max/ghaction-import-gpg@v7
         with:
           gpg_private_key: ${{ secrets.GPGSIGN_KEY }}
           passphrase: ${{ secrets.GPGSIGN_PASSPHRASE }}