chore: optimize the heading levels in change-log

tools/release.sh

@@ -187,6 +187,9 @@ main() {
     fi
   fi
 
+  # Change heading of Patch version to level 2 (a bug from `standard-version`)
+  sed -i "s/^### \[/## \[/g" CHANGELOG.md
+
   _version="$(grep '"version":' "$NODE_CONFIG" | sed 's/.*: "//;s/".*//')"
 
   echo -e "Bump version number to $_version\n"