chore(deps): update dependency eslint-plugin-jsx-a11y to v6.9.0

Author: renovate[bot]

package.json

@@ -65,7 +65,7 @@
     "eslint": "7.3.1",
     "eslint-config-airbnb": "18.2.0",
     "eslint-plugin-import": "2.22.0",
-    "eslint-plugin-jsx-a11y": "6.3.1",
+    "eslint-plugin-jsx-a11y": "6.9.0",
     "eslint-plugin-react": "7.20.3",
     "husky": "4.2.5",
     "node-wp-i18n": "1.2.3",