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>

---

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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>
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go.mod

@@ -20,7 +20,7 @@ require (
 	github.com/42wim/httpsig v1.2.2
 	github.com/42wim/sshsig v0.0.0-20211121163825-841cf5bbc121
 	github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358
-	github.com/ProtonMail/go-crypto v1.1.5
+	github.com/ProtonMail/go-crypto v1.1.6
 	github.com/PuerkitoBio/goquery v1.10.1
 	github.com/SaveTheRbtz/zstd-seekable-format-go/pkg v0.7.2
 	github.com/alecthomas/chroma/v2 v2.15.0