Bump com.approvaltests:approvaltests from 21.0.0 to 21.1.0 (#83)

Bumps [com.approvaltests:approvaltests](https://github.com/approvals/ApprovalTests.Java) from 21.0.0 to 21.1.0.
- [Release notes](https://github.com/approvals/ApprovalTests.Java/releases)
- [Commits](approvals/ApprovalTests.Java@21.0.0...21.1.0)

---
updated-dependencies:
- dependency-name: com.approvaltests:approvaltests
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

modell/build.gradle.kts

@@ -11,5 +11,5 @@ dependencies {
 
     testImplementation("org.junit.jupiter:junit-jupiter-params:${libs.versions.junit.get()}")
     testImplementation(libs.mockk)
-    testImplementation("com.approvaltests:approvaltests:21.0.0")
+    testImplementation("com.approvaltests:approvaltests:21.1.0")
 }