fix: resolve CI failures on python-zeroconf#1784 (attempt 1)

Author: bluetoothbot

pyproject.toml

@@ -1,5 +1,9 @@
 [build-system]
-requires = ['setuptools>=77.0', 'Cython>=3.0.8', "poetry-core>=2.1.0"]
+# Cython 3.3 started feeding declared container item types into its type
+# system, so a ``set[tuple[str, int, int]]`` annotation no longer matches the
+# ``cython.set`` declaration in the sibling .pxd. Cap until the .pxd files
+# carry item types too.
+requires = ['setuptools>=77.0', 'Cython>=3.0.8,<3.3', "poetry-core>=2.1.0"]
 build-backend = "poetry.core.masonry.api"
 
 [project]