Bump eslint-plugin-jsx-a11y from 6.2.1 to 6.2.3 (#11314)

Bumps [eslint-plugin-jsx-a11y](https://github.com/evcohen/eslint-plugin-jsx-a11y) from 6.2.1 to 6.2.3.
- [Release notes](https://github.com/evcohen/eslint-plugin-jsx-a11y/releases)
- [Changelog](https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/CHANGELOG.md)
- [Commits](https://github.com/evcohen/eslint-plugin-jsx-a11y/compare/v6.2.1...v6.2.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -172,7 +172,7 @@
     "enzyme-adapter-react-16": "^1.14.0",
     "eslint": "^5.16.0",
     "eslint-plugin-import": "~2.18.0",
-    "eslint-plugin-jsx-a11y": "~6.2.1",
+    "eslint-plugin-jsx-a11y": "~6.2.3",
     "eslint-plugin-promise": "~4.2.1",
     "eslint-plugin-react": "~7.14.2",
     "jest": "^24.8.0",