Bump Python requirement pytest to 8.1.1

pyproject.toml

@@ -54,7 +54,7 @@ docs = [
     "recommonmark==0.7.1",
 ]
 tests = [
-    "pytest==8.0.1",
+    "pytest==8.1.1",
     "pytest-mock==3.12.0",
     "pytest-responses==0.5.1",
 ]