ci: update vermin to v1.8.0 (spack#2521)

Author: netromdk

.github/workflows/requirements/style/requirements.txt

@@ -4,5 +4,5 @@ flake8==7.2.0
 isort==6.0.1
 mypy==1.15.0
 types-six==1.17.0.20250515
-vermin==1.7.0
+vermin==1.8.0
 pylint==3.3.7