Update pytest requirement from <8,>=7 to >=7,<9

pyproject.toml

@@ -79,7 +79,7 @@ tests = [
     "pydocstyle>=6,<7",  # Style guidelines for Python documentation
     "pytest-console-scripts>=1.1,<2",  # Allow automatic testing of scripts
     "pytest-cov>=4,<5",  # Pytest plugin for working with coverage
-    "pytest>=7,<8",  # Our testing framework
+    "pytest>=7,<9",  # Our testing framework
     "ruff>=0.0.290",  # A very fast python linter & autofixer
     "tox>=4,<5",  # Python test environment manager
 ]