ci : bump up Colab python version to 3.12.12

2026 02 environment

Author: beachdweller

.github/workflows/conda_env_test.yml

@@ -135,7 +135,7 @@ jobs:
     - name: setup python
       uses: actions/setup-python@v6
       with:
-        python-version: '3.10.12'
+        python-version: '3.12.12'
 
     - name: Install uv
       uses: astral-sh/setup-uv@v7