Bump twig/twig from 3.10.3 to 3.11.1 in /modules/btcpay

Bumps [twig/twig](https://github.com/twigphp/Twig) from 3.10.3 to 3.11.1.
- [Changelog](https://github.com/twigphp/Twig/blob/v3.11.1/CHANGELOG)
- [Commits](twigphp/Twig@v3.10.3...v3.11.1)

---
updated-dependencies:
- dependency-name: twig/twig
  dependency-type: indirect
...

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