chore(deps): bump the npm_and_yarn group across 2 directories with 2 …

…updates

Bumps the npm_and_yarn group with 1 update in the / directory: [next](https://github.com/vercel/next.js).
Bumps the npm_and_yarn group with 1 update in the /test directory: [next](https://github.com/vercel/next.js).


Updates `next` from 12.1.6 to 13.5.1
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v12.1.6...v13.5.1)

Updates `postcss` from 8.4.5 to 8.4.14
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.5...8.4.14)

Updates `next` from 12.1.6 to 13.5.1
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v12.1.6...v13.5.1)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
  dependency-group: npm_and_yarn-security-group
- dependency-name: postcss
  dependency-type: indirect
  dependency-group: npm_and_yarn-security-group
- dependency-name: next
  dependency-type: direct:production
  dependency-group: npm_and_yarn-security-group
...

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