Mermaid Timeline with MAIDR

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timeline
  title Web accessibility milestones
  section Guidelines
    1999 : WCAG 1.0
    2008 : WCAG 2.0
    2018 : WCAG 2.1
    2023 : WCAG 2.2
  section Standards
    2014 : WAI-ARIA 1.0
    2017 : WAI-ARIA 1.1