Moved heading-order to experimental

Author: mattscepter

lib/rules/heading-order.json

@@ -3,7 +3,7 @@
   "impact": "moderate",
   "selector": "h1, h2, h3, h4, h5, h6, [role=heading]",
   "matches": "heading-matches",
-  "tags": ["cat.semantics", "best-practice"],
+  "tags": ["cat.semantics", "wcag2aaa", "wcag2410", "experimental"],
   "metadata": {
     "description": "Ensures the order of headings is semantically correct",
     "help": "Heading levels should only increase by one"