CI: pin s3fs for Windows py37_np18 on 1.1.x#36035

simonjayhawkins merged 3 commits intopandas-dev:1.1.xpandas-dev/pandas:1.1.xfrom

simonjayhawkins:troubleshoot-1.1.x-cisimonjayhawkins/pandas:troubleshoot-1.1.x-ciCopy head branch name to clipboard