markdownlint: increase maximum line length to 250

.markdownlintrc

@@ -2,7 +2,7 @@
   "default": true,
   "MD003": { "style": "atx" },
   "MD007": { "indent": 4 },
-  "MD013": { "line_length": 200 },
+  "MD013": { "line_length": 250 },
   "MD033": false,
   "MD034": false,
   "no-hard-tabs": false,