Ignore AAA contrast warning on panel

In common with other components, the panel doesn't meet the AAA contrast ratio of 7:1 for small text (under 24px)

The contrast ratio for white text on blue panels is 5.16:1

The contrast ratio for white text on green panels is 4.52:1  (however by default these use large text)

Author: frankieroberto

packages/govuk-frontend/src/govuk/components/panel/accessibility.puppeteer.test.mjs

@@ -2,13 +2,25 @@ import { axe, render } from '@govuk-frontend/helpers/puppeteer'
 import { getExamples } from '@govuk-frontend/lib/components'
 
 describe('/components/panel', () => {
+  let axeRules
+
+  beforeAll(() => {
+    axeRules = {
+      /**
+       * Ignore 'Element has insufficient color contrast' for WCAG Level AAA
+       *
+       * Affects regular size text on the green and blue panels
+       */
+      'color-contrast-enhanced': { enabled: false }
+    }
+  })
   describe('component examples', () => {
     it('passes accessibility tests', async () => {
       const examples = await getExamples('panel')
 
       for (const exampleName in examples) {
         await render(page, 'panel', examples[exampleName])
-        await expect(axe(page)).resolves.toHaveNoViolations()
+        await expect(axe(page, axeRules)).resolves.toHaveNoViolations()
       }
     }, 120000)
   })