Update module github.com/ProtonMail/go-crypto to v1.1.6 (forgejo) (#7068)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [github.com/ProtonMail/go-crypto](https://github.com/ProtonMail/go-crypto) | require | patch | `v1.1.5` -> `v1.1.6` |

---

### Release Notes

<details>
<summary>ProtonMail/go-crypto (github.com/ProtonMail/go-crypto)</summary>

### [`v1.1.6`](https://github.com/ProtonMail/go-crypto/releases/tag/v1.1.6)

[Compare Source](https://github.com/ProtonMail/go-crypto/compare/v1.1.5...v1.1.6)

#### What's Changed

- Fix `PublicKey.KeyIdString` to return a valid key id by [@&#8203;lubux](https://github.com/lubux) in https://github.com/ProtonMail/go-crypto/pull/269
- Allow Key Flags override [@&#8203;davrux](https://github.com/davrux) in https://github.com/ProtonMail/go-crypto/pull/272
- Only check that message signatures are newer than the key by [@&#8203;twiss](https://github.com/twiss) in https://github.com/ProtonMail/go-crypto/pull/275
- openpgp/clearsign: just use rand.Reader in tests by [@&#8203;mdosch](https://github.com/mdosch) in https://github.com/ProtonMail/go-crypto/pull/276
- Make Issuer Key ID signature subpacket non-critical by [@&#8203;caarlos0](https://github.com/caarlos0) in https://github.com/ProtonMail/go-crypto/pull/266
- v2 API: Improve error messages for encryption key selection by [@&#8203;lubux](https://github.com/lubux) in https://github.com/ProtonMail/go-crypto/pull/271

**Full Changelog**: https://github.com/ProtonMail/go-crypto/compare/v1.1.5...v1.1.6

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "* 0-3 * * *" (UTC), Automerge - "* 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:eyJjcmVhdGVkSW5WZXIiOiIzOS4xNzguMSIsInVwZGF0ZWRJblZlciI6IjM5LjE3OC4xIiwidGFyZ2V0QnJhbmNoIjoiZm9yZ2VqbyIsImxhYmVscyI6WyJkZXBlbmRlbmN5LXVwZ3JhZGUiLCJ0ZXN0L25vdC1uZWVkZWQiXX0=-->

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7068
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: Renovate Bot <forgejo-renovate-action@forgejo.org>
Co-committed-by: Renovate Bot <forgejo-renovate-action@forgejo.org>