Benchmarking started to fail

[yarikoptic]

looked at output of fail in

• Remove specification of user.* git config for docbuild and test CIs #114

which was

24s
Run asv run --show-stderr --python 3.8 HEAD^-[1](https://github.com/datalad/datalad-fuse/actions/runs/9034655491/job/24827683544?pr=114#step:9:1)
Couldn't load asv.plugins._mamba_helpers because
No module named 'libmambapy'
· Creating environments

so nothing related to those change... needs fixing up