Bump pytest to 9.0.3 for CVE-2025-71176 (#76)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: osinjoku

requirements.txt

@@ -8,7 +8,7 @@ polib==1.2.0
 pre-commit==4.2.0
 pydata-sphinx-theme==0.16.1
 pylint==3.3.4
-pytest==8.3.4
+pytest==9.0.3
 sphinx==8.1.3
 sphinx-multiversion==0.2.4
 sphinx-autodoc-typehints==3.0.1