Update dependency rules_jvm_external to v6.8

Author: renovate[bot]

junit-jupiter-starter-bazel/MODULE.bazel

@@ -2,7 +2,7 @@ JUNIT_JUPITER_VERSION = "5.13.3"
 
 JUNIT_PLATFORM_VERSION = "1.13.3"
 
-bazel_dep(name = "rules_jvm_external", version = "6.7")
+bazel_dep(name = "rules_jvm_external", version = "6.8")
 bazel_dep(name = "contrib_rules_jvm", version = "0.29.0")
 
 maven = use_extension("@rules_jvm_external//:extensions.bzl", "maven")