Bump glean-parser from 2.5.0 to 3.0.0 in /samples/qt-qml-app

Bumps [glean-parser](https://github.com/mozilla/glean_parser) from 2.5.0 to 3.0.0.
- [Release notes](https://github.com/mozilla/glean_parser/releases)
- [Changelog](https://github.com/mozilla/glean_parser/blob/main/CHANGELOG.md)
- [Commits](mozilla/glean_parser@v2.5.0...v3.0.0)

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

Author: dependabot[bot]

samples/qt-qml-app/requirements.txt

@@ -1,3 +1,3 @@
 PySide2==5.15.2
 shiboken2==5.15.2
-glean_parser==2.5.0
+glean_parser==3.0.0