Don't install optional pyarrow package in Python 3.13 CI build

PyArrow's dependencies (specifically sparse and numba) aren't supported on Python 3.13 yet, so removing for now since PyArrow is included in the Python 3.11 CI build (#3605). Downgraded Python version in environment.yml from =3.13 to >=3.10

.github/workflows/ci_tests.yaml

@@ -78,7 +78,7 @@ jobs:
             numpy-version: '2.1'
             pandas-version: ''
             xarray-version: ''
-            optional-packages: ' contextily geopandas ipython pyarrow rioxarray sphinx-gallery'
+            optional-packages: ' contextily geopandas ipython rioxarray sphinx-gallery'
           # The job below is for testing GeoPandas v0.x on Ubuntu.
           # The python-version here can't be the versions in the matrix.python-version
           # defined above. Otherwise, other jobs will be overridden by this one.

environment.yml

@@ -3,7 +3,7 @@ channels:
     - conda-forge
     - nodefaults
 dependencies:
-    - python=3.13
+    - python>=3.10
     # Required dependencies
     - gmt=6.5.0
     - ghostscript=10.04.0