Update dependency rules_jvm_external to v6.9

Author: renovate[bot]

junit-jupiter-starter-bazel/MODULE.bazel

@@ -1,6 +1,6 @@
 JUNIT_VERSION = "6.0.1"
 
-bazel_dep(name = "rules_jvm_external", version = "6.8")
+bazel_dep(name = "rules_jvm_external", version = "6.9")
 bazel_dep(name = "contrib_rules_jvm", version = "0.30.0")
 
 maven = use_extension("@rules_jvm_external//:extensions.bzl", "maven")