Tweak release script dependabot wording

scripts-dev/release.py

@@ -875,6 +875,8 @@ def build_dependabot_changelog(repo: Repo, current_version: version.Version) ->
     for i, message in enumerate(messages):
         messages[i] = re.sub(r"(.*) \(#(\d+)\)$", replacer, message)
     messages.insert(0, "### Updates to locked dependencies\n")
+    # Add an extra blank line to the bottom of the section
+    messages.append("")
     return "\n".join(messages)