Add comment for hadolint

Author: lfrancke

config/versions.yaml

@@ -7,4 +7,5 @@ rust_version: 1.80.1
 # IMPORTANT
 # If you change the Hadolint version here, make sure to also change the hook
 # refs in the local and template .pre-commit-config.yaml files.
+# And due to a bug you also need to update the version in .github/workflows/pr_pre_commit.yml
 hadolint_version: v2.12.0