build: limit flit version

Author: RobPasMue

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["flit_core >=3.2,<4"]
+requires = ["flit_core >=3.2,<3.11"] # THIS SHOULD BE REVERTED TO '["flit_core >=3.2,<4"]'
 build-backend = "flit_core.buildapi"
 
 [project]