Updated the tags

Author: mattscepter

doc/rule-descriptions.md

@@ -131,7 +131,7 @@ Rules that check for conformance to WCAG AAA success criteria that can be fully
 | Rule ID                                                                                                                            | Description                                                                                                       | Impact   | Tags                                                                     | Issue Type                 | ACT Rules                                          |
 | :--------------------------------------------------------------------------------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------- | :------- | :----------------------------------------------------------------------- | :------------------------- | :------------------------------------------------- |
 | [color-contrast-enhanced](https://dequeuniversity.com/rules/axe/4.9/color-contrast-enhanced?application=RuleDescription)           | Ensures the contrast between foreground and background colors meets WCAG 2 AAA enhanced contrast ratio thresholds | Serious  | cat.color, wcag2aaa, wcag146, ACT                                        | failure, needs review | [09o5cg](https://act-rules.github.io/rules/09o5cg) |
-| [heading-order](https://dequeuniversity.com/rules/axe/4.9/heading-order?application=RuleDescription)                               | Ensures the order of headings is semantically correct                                                             | Moderate | cat.semantics, wcag2aaa, wcag2410, a11y-engine, a11y-engine-experimental | failure, needs review |                                                    |
+| [heading-order](https://dequeuniversity.com/rules/axe/4.9/heading-order?application=RuleDescription)                               | Ensures the order of headings is semantically correct                                                             | Moderate | cat.structure, wcag2aaa, wcag2410, a11y-engine, a11y-engine-experimental | failure, needs review |                                                    |
 | [identical-links-same-purpose](https://dequeuniversity.com/rules/axe/4.9/identical-links-same-purpose?application=RuleDescription) | Ensure that links with the same accessible name serve a similar purpose                                           | Minor    | cat.semantics, wcag2aaa, wcag249                                         | needs review          | [b20e66](https://act-rules.github.io/rules/b20e66) |
 | [meta-refresh-no-exceptions](https://dequeuniversity.com/rules/axe/4.9/meta-refresh-no-exceptions?application=RuleDescription)     | Ensures <meta http-equiv="refresh"> is not used for delayed refresh                               | Minor    | cat.time-and-media, wcag2aaa, wcag224, wcag325                           | failure                    | [bisz58](https://act-rules.github.io/rules/bisz58) |
 

lib/checks/navigation/heading-order.json

@@ -6,8 +6,8 @@
     "impact": "moderate",
     "messages": {
       "pass": "Heading order valid",
-      "fail": "Heading order invalid",
-      "incomplete": "Fix the order of headings. Headings should be in descending order of size without skipping levels. For example, <h2> should be followed by <h3>, not <h4> or <h5>."
+      "fail": "Fix the order of headings. Headings should be in descending order of size without skipping levels. For example, <h2> should be followed by <h3>, not <h4> or <h5>.",
+      "incomplete": "Unable to determine previous heading"
     }
   }
 }