Update README.md

[dalamanster]

rh-ruby23-devel not found in SCL. Use rh-ruby23-ruby-devel instead

Pre-Request Checklist

• Passes rubocop code analysis (try rubocop --auto-correct)
• Tests added or adapted (try rake test)
• Changes are reflected in the documentation
• User-visible changes appended to CHANGELOG.md

Description

rh-ruby23-devel not found in SCL. Use rh-ruby23-ruby-devel instead

[codecov-io]

Codecov Report

Merging #1731 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1731   +/-   ##
=======================================
  Coverage   63.42%   63.42%           
=======================================
  Files          30       30           
  Lines        1490     1490           
=======================================
  Hits          945      945           
  Misses        545      545

---

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 2cec0e1...f25cfc7. Read the comment docs.