fix(deps): update dependency org.junit:junit-bom to v5.13.4 (#741)

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>

Author: elastic-renovate-prod[bot]

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 shadow = "8.3.8"
 jib = "3.4.5"
 spotless = "7.2.0"
-junit = "5.13.3"
+junit = "5.13.4"
 autoservice = "1.1.1"
 log4j2 = "2.25.1"