Replace Python version glob with macro (needed for Python 3.10+)

See https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/PQIGCQCRNBYNXBX2ICWEM3PLDLNOG2ZT/

Co-authored-by: Tomas Hrnciar <thrnciar@redhat.com>

python-rst-linker.spec

@@ -75,7 +75,7 @@ rm -rf html/.{doctrees,buildinfo}
 %license LICENSE
 %doc README.rst
 %{python3_sitelib}/rst
-%{python3_sitelib}/rst.linker-%{version}-py?.?.egg-info
+%{python3_sitelib}/rst.linker-%{version}-py%{python3_version}.egg-info
 
 %if %{with docs}
 %files -n python-%{pkg_name}-doc