Bump the npm_and_yarn group with 2 updates

Bumps the npm_and_yarn group with 2 updates: [next](https://github.com/vercel/next.js) and [postcss](https://github.com/postcss/postcss).


Updates `next` from 12.3.4 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@v12.3.4...v13.5.1)

Updates `postcss` from 8.4.14 to 8.4.31
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.14...8.4.31)

Updates `next` from 13.5.1 to 13.5.6
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v12.3.4...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>