message: fix: NoMissingHeadings test guidance link
  Details
  Change guidance link for NoMissingHeadings test from WCAG 2.4.1 to WCAG 2.4.6
  Motivation
  Addresses
  Context
  Tested in dev build when exporting JSON. missingHeadings test is listed under WCAG 2.4.6, where it was previously listed under WCAG 2.4.1
diff: @@ -40,7 +40,7 @@ export const NoMissingHeadings: Requirement = {
  howToTest: missingHeadingsHowToTest,
  isManual: true,
  ...content,
  - guidanceLinks: [link.WCAG_1_3_1, link.WCAG_2_4_1],
  + guidanceLinks: [link.WCAG_1_3_1, link.WCAG_2_4_6],
  getAnalyzer: provider =>
  provider.createRuleAnalyzer(
  AnalyzerConfigurationFactory.forScanner({
  