Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Co-authored-by: mbkma <39454100+mbkma@users.noreply.github.com>

* CI: update NEWS which caused some workflow issues

* CI: disable gdk-pixbuf-thumbnailer for meson workflows

 - gdk-pixbuf-thumbnailer is obsolete and should be replaced
   with glycin-thumbnailer

* meson: Only use girepository-2.0 if libpeas uses it too

Fixes header conflicts on systems where glib has girepository-2.0 but
libpeas still uses the old gobject-introspection-1.0 headers.

---------

Co-authored-by: Victor Kareh <vkareh@redhat.com>

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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