build(deps): bump packaging/linux/flatpak/deps/shared-modules

Bumps [packaging/linux/flatpak/deps/shared-modules](https://github.com/flathub/shared-modules) from `8a98211` to `6ff1922`.
- [Commits](flathub/shared-modules@8a98211...6ff1922)

---
updated-dependencies:
- dependency-name: packaging/linux/flatpak/deps/shared-modules
  dependency-version: 6ff1922d72ca6c46eca067f1f0c1bf6b36289012
  dependency-type: direct:production
...

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Author: dependabot[bot]