chore(deps): update dependency rules_rust to v0.68.1

Author: renovate[bot]

tests/MODULE.bazel

@@ -26,7 +26,7 @@ bazel_dep(name = "rules_cc", version = "0.2.14")
 bazel_dep(name = "rules_foreign_cc", version = "0.15.1")
 bazel_dep(name = "rules_go", version = "0.59.0", repo_name = "io_bazel_rules_go")
 bazel_dep(name = "rules_license", version = "1.0.0")
-bazel_dep(name = "rules_rust", version = "0.67.0")
+bazel_dep(name = "rules_rust", version = "0.68.1")
 bazel_dep(name = "rules_shell", version = "0.6.1")
 bazel_dep(name = "abseil-cpp", version = "20250814.1", repo_name = "com_google_absl")
 bazel_dep(name = "boringssl", version = "0.20251110.0")