document content trust feature
documents concourse/registry-image#46
* When the web node is instructing a worker to create a container, any logs emitted will mention that worker's name #4438. Thanks @christophermancini!
+#### <sub><sup><a name="v560-note-registry-image-46" href="#v560-registry-image-46">:link:</a></sup></sub> feature
+
+* @SimonXming added the [`content_trust:`](https://github.com/concourse/registry-image-resource#source-configuration) field to the [`registry-image resource`](https://github.com/concourse/registry-image-resource), so now you can sign your container images with a notary server concourse/registry-image-resource#41, concourse/registry-image-resource#46.
+
#### <sub><sup><a name="v560-note-4314" href="#v560-note-4314">:link:</a></sup></sub> fix
* @robwhitby fixed an issue with `fly login` where Safari would block your token from being transferred to fly #4314, #4423, #4439.
#### <sub><sup><a name="v560-note-semver-102" href="#v560-note-semver-102">:link:</a></sup></sub> fix
-@bodin fixed an issue with the [`semver-resource`](https://github.com/concourse/semver-resource) with the [git driver](https://github.com/concourse/semver-resource#git-driver): now the resource will create the `file:` specified in the source configuration if it doesn't already exist exist concourse/semver-resource#102.
+* @bodin fixed an issue with the [`semver-resource`](https://github.com/concourse/semver-resource) with the [git driver](https://github.com/concourse/semver-resource#git-driver): now the resource will create the `file:` specified in the source configuration if it doesn't already exist exist concourse/semver-resource#102.
#### <sub><sup><a name="v560-note-semver-92" href="#v560-note-semver-92">:link:</a></sup></sub> fix
-@mgsolid fixed an [issue](https://github.com/concourse/semver-resource/issues/89) the git driver for the [`semver-resource`](https://github.com/concourse/semver-resource) would go into an infinite loop when `git push` failed concourse/semver-resource#92.
+* @mgsolid fixed an [issue](https://github.com/concourse/semver-resource/issues/89) the git driver for the [`semver-resource`](https://github.com/concourse/semver-resource) would go into an infinite loop when `git push` failed concourse/semver-resource#92.
