Replace ruby:2.6 in examples and test cases with ruby:2.7
What does this MR do?
This updates all the ruby:2.6
image mentions to ruby:2.7
.
Why was this MR needed?
Ruby 2.6 support ends in 2 months. Use Ruby 2.7 as a default since this will be supported for another year.
What's the best way to test this MR?
What are the relevant issue numbers?
Edited by Stan Hu