update setup-uv version

They don't allow v8 anymore and we have to pin the exact number since v8.

Author: ManonMarchand

.github/workflows/notebooks-check_ubuntu.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Install uv
-        uses: astral-sh/setup-uv@v8
+        uses: astral-sh/setup-uv@v8.1.0
       - name: Setup python 3.10
         uses: actions/setup-python@v6
         with: