Update dependency org.junit:junit-bom to v5.13.0 (#260)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 doma = "3.8.0"
 kotlin = "2.1.21"
-junit = "5.12.2"
+junit = "5.13.0"
 spotless = "7.0.4"
 doma-codegen = "3.0.0"
 doma-compile = "4.0.0"