Ruby 3 Upgrade: Fix tests in modules/check_in/spec/request/v0/travel_claims_request_spec.rb

[holdenhinkle]

Referencing ticket department-of-veterans-affairs/va.gov-team#54796

Fix the following tests:

 rspec "./modules/check_in/spec/request/v0/travel_claims_request_spec.rb[1:1:3:1:1]" # L86
 rspec "./modules/check_in/spec/request/v0/travel_claims_request_spec.rb[1:1:3:4:1]" # L158
 rspec "./modules/check_in/spec/request/v0/travel_claims_request_spec.rb[1:1:3:6:1]" # L206
 rspec "./modules/check_in/spec/request/v0/travel_claims_request_spec.rb[1:1:3:5:1]" # L182
 rspec "./modules/check_in/spec/request/v0/travel_claims_request_spec.rb[1:1:3:2:1]" # L110
 rspec "./modules/check_in/spec/request/v0/travel_claims_request_spec.rb[1:1:3:3:1]" # L134

Ruby 2.7 deprecated automatic casting of a hash passed as the last argument of a method to keyword arguments. You must now use actual keyword arguments (foo(bar: 'baz') instead of foo({bar: 'baz'})) or cast the hash to keyword args using the double splat (foo(**{bar: 'baz'})).