Bump org.robolectric:robolectric from 4.14.1 to 4.15.1 (#341)

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -76,7 +76,7 @@ junit-jupiter = "org.junit.jupiter:junit-jupiter:5.12.2"
 
 assertk = "com.willowtreeapps.assertk:assertk-jvm:0.28.1"
 
-robolectric = "org.robolectric:robolectric:4.14.1"
+robolectric = "org.robolectric:robolectric:4.15.1"
 
 testLogger = "com.adarshr:gradle-test-logger-plugin:4.0.0"