Bump docker-registry from 2022-04-20T22-48-00 to 2022-04-21T23-12-00

Bumps [docker-registry](https://github.com/docker-client/docker-registry) from 2022-04-20T22-48-00 to 2022-04-21T23-12-00.
- [Release notes](https://github.com/docker-client/docker-registry/releases)
- [Changelog](https://github.com/docker-client/docker-registry/blob/main/RELEASE.md)
- [Commits](https://github.com/docker-client/docker-registry/commits)

---
updated-dependencies:
- dependency-name: de.gesellix:docker-registry
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

api-client/build.gradle.kts

@@ -79,7 +79,7 @@ dependencies {
 
   testImplementation("org.apache.commons:commons-compress:1.21")
   testImplementation("de.gesellix:testutil:[2021-08-05T22-09-32,)")
-  testImplementation("de.gesellix:docker-registry:2022-04-20T22-48-00")
+  testImplementation("de.gesellix:docker-registry:2022-04-21T23-12-00")
 }
 
 tasks.withType(Test::class) {