build: use mypy<1.11.0 until #682 is fixed (#683)

* build: use mypy<1.11.0 until #682 is fixed

* add comment

noxfile.py

diff --git a/noxfile.py b/noxfile.py
index 1e6a570..a15795e 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -247,7 +247,9 @@
 @nox.session(python=DEFAULT_PYTHON_VERSION)
 def mypy(session):
     """Run type-checking."""
-    session.install(".[grpc]", "mypy")
+    # TODO(https://github.com/googleapis/python-api-core/issues/682):
+    # Use the latest version of mypy instead of mypy<1.11.0
+    session.install(".[grpc]", "mypy<1.11.0")
     session.install(
         "types-setuptools",
         "types-requests",