Fails to cache in certain environments on windows 2019

[JAicewizard]

On windows this action doesn't work under all circumstances. One such instance is the following github action(run): https://github.com/duckdb-faiss-ext/duckdb-faiss-ext/actions/runs/11274103433/job/31494248160

The environment is windows 2019, with rtools42 and using ccache as a C compiler.