build(deps): bump github.com/containerd/imgcrypt

Bumps [github.com/containerd/imgcrypt](https://github.com/containerd/imgcrypt) from 1.1.12-0.20240528203804-3ca09a2db5cd to 1.2.0-rc1.
- [Release notes](https://github.com/containerd/imgcrypt/releases)
- [Changelog](https://github.com/containerd/imgcrypt/blob/main/CHANGES)
- [Commits](https://github.com/containerd/imgcrypt/commits/v1.2.0-rc1)

---
updated-dependencies:
- dependency-name: github.com/containerd/imgcrypt
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/containers/ocicrypt/blockcipher/blockcipher.go

@@ -96,9 +96,8 @@ func (lbco LayerBlockCipherOptions) GetOpt(key string) (value []byte, ok bool) {
 		return v, ok
 	} else if v, ok := lbco.Private.CipherOptions[key]; ok {
 		return v, ok
-	} else {
-		return nil, false
 	}
+	return nil, false
 }
 
 func wrapFinalizerWithType(fin Finalizer, typ LayerCipherType) Finalizer {