DEV: Be more lenient in CLI confirmation (discourse#16290)

If someone types `yes` rather than `YES`, continue anyway.

The chance of typing `yes`, when you actually want to stop, is non-existent. The chance of typing `yes` when you meant `YES` is  high, and it's very frustrating when the script quite because you got the case wrong!

script/discourse

@@ -45,7 +45,7 @@ class DiscourseCLI < Thor
     puts "THIS TASK WILL REWRITE DATA, ARE YOU SURE (type YES)"
     puts "WILL RUN ON ALL #{RailsMultisite::ConnectionManagement.all_dbs.length} DBS" if options[:global]
     text = STDIN.gets
-    if text.strip != "YES"
+    if text.strip.upcase != "YES"
       puts "aborting."
       exit 1
     end