fix: test with gpu CP with 3.12 support

pyproject.toml

@@ -38,10 +38,10 @@ python = ">=3.8.1,<3.13"
 # source, so we should only use this for Concrete Python's non-public releases
 # https://python-poetry.org/docs/1.7/repositories#project-configuration
 # concrete-python = {version="==2.7.0", source = "zama-pypi-cpu"}
-concrete-python = {version="==2.8.1", source = "zama-pypi-cpu"}
 concrete-ml-extensions = [
     {version = "0.1.2", platform = "linux" }
 ]
+concrete-python = {version="==2.8.1.dev20241026", source = "zama-pypi-cpu"}
 setuptools = "65.6.3"
 skops = {version = "0.5.0"}
 xgboost = "1.6.2"
@@ -77,7 +77,7 @@ pandas = "2.0.3"
 # Zama sources
 [[tool.poetry.source]]
 name = "zama-pypi-cpu"
-url = "https://pypi.zama.ai/cpu"
+url = "https://pypi.zama.ai/gpu"
 priority = "explicit"
 
 # Development dependencies