fix(deps): update junit5 monorepo to v5.12.1

Author: renovate[bot]

gradle/libraries.versions.toml

@@ -3,7 +3,7 @@ retrofit2 = "2.11.0"
 jjwt = "0.12.6"
 jackson = "2.18.3"
 assertj = "3.27.3"
-junit = "5.11.4"
+junit = "5.12.1"
 slf4j = "2.0.17"
 mockito = "5.16.0"
 okhttp3 = "4.12.0"