Merge branch 'fio-docs-ci' of https://github.com/vincentkfu/fio

* 'fio-docs-ci' of https://github.com/vincentkfu/fio:
  windows: update the installer build for renamed files
  ci: install sphinx packages and add doc building to GitHub Actions
  HOWTO: combine two chunk_size listings into a single one
  HOWTO: combine separate hipri listings into a single one
  HOWTO: combine multiple pool option listings
  docs: rename HOWTO to HOWTO.rst
  docs: update Makefile in order to detect build failures
  docs: document cpumode option for the cpuio ioengine