Bump nokogiri from 1.10.9 to 1.15.6 in /2.7-slim#16

dependabot[bot] wants to merge 1 commit intomasteramaysim-au/docker-rspec-test-runner:masterfrom

dependabot/bundler/2.7-slim/nokogiri-1.15.6amaysim-au/docker-rspec-test-runner:dependabot/bundler/2.7-slim/nokogiri-1.15.6Copy head branch name to clipboard