include solarfactors in python 3.12 tests (pvlib#2380)

Author: kandersolar

ci/requirements-py3.12.yml

@@ -25,4 +25,4 @@ dependencies:
     - statsmodels
     - pip:
         - nrel-pysam>=2.0
-        # - solarfactors  # required shapely<2 isn't available for 3.12
+        - solarfactors