fix xls package build failure

See: https://github.com/hdl/conda-eda/actions/runs/5127108900/jobs/9222395220

Collecting pyyaml==5.4.1
  Downloading PyYAML-5.4.1.tar.gz (175 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 175.1/175.1 KB 21.4 MB/s eta 0:00:00
  Installing build dependencies: started
  Installing build dependencies: finished with status 'error'
 (  error: subprocess-exited-with-error

  × pip subprocess to install build dependencies did not run successfully.
  │ exit code: 1
  ╰─> [2 lines of output]
      ERROR: Could not find a version that satisfies the requirement setuptools (from versions: none)
      ERROR: No matching distribution found for setuptools
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× pip subprocess to install build dependencies did not run successfully.
│ exit code: 1
╰─> See above for output.

Seems to be failing because of https://github.com/google/xls/issues/944 and the recent python version updated in #326

hdl / conda-eda

fix xls package build failure #331