documentation: auth without docker, not without ko

[arve0]

I believe it should without docker, right? Using ko without ko sounds wrong.

[codecov-io]

Codecov Report

Merging #266 (38b5261) into master (960e6a3) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #266   +/-   ##
=======================================
  Coverage   36.89%   36.89%           
=======================================
  Files          33       33           
  Lines        1461     1461           
=======================================
  Hits          539      539           
  Misses        833      833           
  Partials       89       89           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 960e6a3...38b5261. Read the comment docs.

[jonjohnsonjr]

Thanks!