Bump gtk4 from 0.11.2 to 0.11.3

Bumps [gtk4](https://github.com/gtk-rs/gtk4-rs) from 0.11.2 to 0.11.3.
- [Release notes](https://github.com/gtk-rs/gtk4-rs/releases)
- [Changelog](https://github.com/gtk-rs/gtk4-rs/blob/main/CHANGELOG.md)
- [Commits](gtk-rs/gtk4-rs@0.11.2...0.11.3)

---
updated-dependencies:
- dependency-name: gtk4
  dependency-version: 0.11.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]