Update minimum pytest-jupyter; we need 0.7 as it

enabled `jp_ws_fetch` header override in:
gttps://github.com/jupyter-server/pytest-jupyter/pull/51

Author: krassowski

pyproject.toml

@@ -56,7 +56,7 @@ test = [
     "ipykernel",
     "pytest-console-scripts",
     "pytest-timeout",
-    "pytest-jupyter[server]>=0.4",
+    "pytest-jupyter[server]>=0.7",
     "pytest>=7.0",
     "requests",
     "pre-commit",