Fix deprecation warning to reference Rails 7

[aidanharan]

Fix deprecation message in test that references Rails 6.2 instead of Rails 7.0.

See https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/runs/5626810774?check_suite_focus=true

Failure:
RelationTest#test_reorder_with_first_coerced [/activerecord-sqlserver-adapter/test/cases/coerced_tests.rb:1201]:
No deprecation warning matched (?-mix:`\.reorder\(nil\)`\ with\ `\.first`\ \/\ `\.first!`\ no\ longer\ takes\ non\-deterministic\ result\ in\ Rails\ 6\.2\.\ To\ continue\ taking\ non\-deterministic\ result,\ use\ `\.take`\ \/\ `\.take!`\ instead\.): DEPRECATION WARNING: `.reorder(nil)` with `.first` / `.first!` no longer takes non-deterministic result in Rails 7.0. To continue taking non-deterministic result, use `.take` / `.take!` instead. (called from block (2 levels) in test_reorder_with_first_coerced at /activerecord-sqlserver-adapter/test/cases/coerced_tests.rb:1202)

rails test activerecord-sqlserver-adapter/test/cases/coerced_tests.rb:1194