fix yaml syntax issue

Author: kandersolar

ci/requirements-py3.13.yml

@@ -23,6 +23,6 @@ dependencies:
     - requests
     - scipy >= 1.6.0
     - statsmodels
-    - pip:
+    # - pip:
         # - nrel-pysam>=2.0  # not available for py3.13 as of Dec 2024
         # - solarfactors  # required shapely<2 isn't available for Python>=3.12