bump default torch to 2.5.1 #143

Job	Run time
coverage	2m 46s
tests	1m 49s
env (windows-latest)	2m 10s
env (macos-latest)	26s
env (ubuntu-latest)	19s
workflow-coverage / dynamo (float32)	14m 1s
workflow-coverage / slow (float32)	9m 29s
workflow-mypy / python-3.12, torch-2.5.1	1m 3s
workflow-coverage / slow (float64)	11m 40s
workflow-coverage / overall (float32)	2m 7s
workflow-tests / python-3.10, torch-2.1.2	1m 49s
workflow-coverage / overall (float64)	2m 22s
workflow-tutorials / python-3.12, torch-2.5.1	12m 58s
workflow-tests / python-3.10, torch-2.5.1	1m 48s
workflow-docs / docstests & sphinx-build - python-3.12, torch-2.5.1	3m 32s
workflow-tests / python-3.12, torch-2.5.1	1m 51s
workflow-coverage / report	41s
collector	1s
	1h 10m 52s

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