CI: Update version of 'black'
closes #35925 

Not many files left so am making a PR to close this off
/azp run <samp>
Azure Pipelines successfully started running 1 pipeline(s).<br>

</samp> Thanks @MarcoGorelli ! @pandas-dev/pandas-core @pandas-dev/pandas-triage reminder/notification to update `black`, in case you've not already done so