Pin scipy for statsmodels #2093

Job	Run time
Code linting	50s
Test with Python3.13 (Anaconda, macos-latest)	5m 57s
Test with Python3.13 (Anaconda, ubuntu-latest)	4m 33s
Test with Python3.12 (tox, ubuntu-latest), upstream=)	7m 45s
Test with Python3.11 (tox, macos-latest), upstream=)	23m 47s
Test with Python3.12 (tox, macos-latest), upstream=)	11m 49s
Test with Python3.11 (tox, ubuntu-latest), upstream=)	6m 30s
Test with Python3.10 (Anaconda, macos-latest)	6m 53s
Test with Python3.10 (tox, ubuntu-latest), upstream=)	6m 52s
Test with Python3.13 (tox, ubuntu-latest), upstream=)	6m 39s
Test with Python3.10 (Anaconda, ubuntu-latest)	4m 47s
Test with Python3.13 (tox, macos-latest), upstream=)	11m 42s
Finish	9s
	1h 38m 13s

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