chore: use python>=3.10 in conda env, fix map plot example (#2501)

Fix a problem in example notebook CI. The delete parameter to TemporaryDirectory was added in Python 3.12, but we still want to support >=3.10. Also the environment.yml still had a lower bound of 3.9, bump it.

Author: wpbonelli

.docs/Notebooks/plot_map_view_example.py

@@ -56,7 +56,7 @@
 sim_name = "freyberg"
 
 # Set the paths
-tempdir = TemporaryDirectory(delete=False)
+tempdir = TemporaryDirectory()
 modelpth = Path(tempdir.name)
 
 # Check if we are in the repository and define the data path.

etc/environment.yml

@@ -5,7 +5,7 @@ dependencies:
   - pip
 
   # required
-  - python>=3.9
+  - python>=3.10
   - numpy>=1.20.3
   - matplotlib>=1.4.0
   - pandas>=2.0.0