Update dependency com.willowtreeapps.assertk:assertk to v0.28.0 (#401)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -115,7 +115,7 @@ desugar = { module = "com.android.tools:desugar_jdk_libs", version = "2.0.4" }
 lints-compose = { module = "com.slack.lint.compose:compose-lint-checks", version = "1.2.0" }
 
 junit = { module = "junit:junit", version = "4.13.2" }
-assertk = { module = "com.willowtreeapps.assertk:assertk", version = "0.27.0" }
+assertk = { module = "com.willowtreeapps.assertk:assertk", version = "0.28.0" }
 androidx-workmanager-test = { module = "androidx.work:work-testing", version.ref = "work" }
 androidx-test-junit = { module = "androidx.test.ext:junit", version = "1.1.5" }
 androidx-espresso-core = { module = "androidx.test.espresso:espresso-core", version = "3.5.1" }