deps: update dependency io.mockk:mockk to v1.13.8

Author: renovate[bot]

gradle/libs.versions.toml

@@ -42,7 +42,7 @@ log4jApiKotlin = "1.2.0"
 logback = "1.4.11"
 maven = "3.9.4"
 mavenResolver = "1.9.15"
-mockk = "1.13.7"
+mockk = "1.13.8"
 okhttp = "4.11.0"
 postgres = "42.6.0"
 postgresEmbedded = "1.0.2"