Bump python from 3.12 to 3.14

Bumps [python](https://github.com/python/cpython) from 3.12.12 to 3.14.3.
  - [Release notes](https://github.com/python/cpython/releases/tag/v3.12.12)
  - [Changelog](https://docs.python.org/3.14/whatsnew/3.14.html)
  - [Commits](python/cpython@v3.12.12...v3.14.3)

Author: weiji14

base-notebook/environment.yml

@@ -3,6 +3,6 @@ channels:
   - conda-forge
   - nodefaults
 dependencies:
-  - python=3.12
+  - python=3.14
   - pangeo-notebook=2026.01.21
   - pip