Bump org.junit:junit-bom from 5.13.2 to 5.13.3 (#324)

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ assertj = "3.27.3"
 buf = "1.55.1"
 cel = "0.9.1"
 error-prone = "2.39.0"
-junit = "5.13.2"
+junit = "5.13.3"
 maven-publish = "0.33.0"
 protobuf = "4.31.1"