Update dependency com.willowtreeapps.assertk:assertk to v0.28.1 (#270)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -13,7 +13,7 @@ aapt2Proto = { module = "com.android.tools.build:aapt2-proto", version.ref = "aa
 protobufJava = { module = "com.google.protobuf:protobuf-java", version.ref = "protobufJava" }
 clikt = "com.github.ajalt.clikt:clikt:4.3.0"
 junit = "junit:junit:4.13.2"
-assertk = "com.willowtreeapps.assertk:assertk:0.28.0"
+assertk = "com.willowtreeapps.assertk:assertk:0.28.1"
 okio = "com.squareup.okio:okio:3.9.0"
 byteunits = "com.jakewharton.byteunits:byteunits:0.9.1"
 asm = "org.ow2.asm:asm:9.7"