WORKSPACE: fix usage of bzlmod lockfile

Closes monogon-dev/monogon#311

Change-Id: Ib93802389e3f11f6f03f1fe5278b32c270e37cd4
Reviewed-on: https://review.monogon.dev/c/monogon/+/3250
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/MODULE.bazel b/MODULE.bazel
index 7bc2cba..79ceccf 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -5,6 +5,9 @@
 # For more details, please check https://github.com/bazelbuild/bazel/issues/18958
 ###############################################################################
 
+# NOTE: When editing this file, also update the lockfile.
+#   bazel mod deps --lockfile_mode=update
+
 bazel_dep(name = "platforms")
 single_version_override(
     module_name = "platforms",